Jump to: Spoilers (6)
Kira was a last-minute addition to the cast. The original plan was to include the Star Trek: The Next Generation (1987) character of Ro Laren, but Michelle Forbes didn't want to do a series at the time.
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Although we only rarely see it, there is an ATM in Quark's bar. It dispenses the various types of currency used by major races visiting the station: Federation credits, Bajoran litas, Cardassian leks, and Ferengi latinum.
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Colm Meaney was initially reluctant about signing onto the series. Meaney was comfortable playing O'Brien on an episode by episode basis for Star Trek: The Next Generation (1987), and at the time, was unsure if he wanted to play a full time television role.
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Alexander Siddig and Nana Visitor were married in real life in 1997 (after the show's fifth season).
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The character of Garak, a former spy who works as a tailor on the station, was inspired by certain John le Carré spy novels, particularly "Tinker, Tailor, Soldier, Spy".
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When Colm Meaney was fitted for his Deep Space Nine uniform, he made two requests of the costume designers. He explained that unlike the officers, the non-commissioned Chief O'Brien was a working man. So he needed to be able to roll up his sleeves, and he needed pockets for his tools. The costume department altered his uniform accordingly.
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The jars of "pills" in Dr. Bashir's office were filled with M&Ms. In many instances during the early episodes, the level of the pills would change between shots because crew members kept stealing them. The problem was solved by epoxying the lids in place.
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According to an April 2003 interview, Avery Brooks was initially required by contract to appear with hair in order to prevent confusion with his Spenser: For Hire (1985) character, Hawk. In later seasons, as Sisko became established, Brooks was allowed to shave his head and re-grow his beard.
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Armin Shimerman (Quark) and Marc Alaimo (Gul Dukat the Cardassian) appeared as one of the first actors to portray members of their respective species, and both appeared on Star Trek: The Next Generation (1987). Shimerman played the Ferengi officer Letek in Star Trek: The Next Generation: The Last Outpost (1987) while Alaimo played the Cardassian officer Gul Macet in Star Trek: The Next Generation: The Wounded (1991).
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The Dominion storyline was originally only meant to span two episodes. Ronald D. Moore and Ira Steven Behr lobbied to make the storyline on-going, but met with resistance from Executive Producer Rick Berman, who wanted to maintain an episodic format to the series. After Berman left production to oversee the launch of Star Trek: Voyager (1995), Moore and Behr were given more creative control over this series, making the Dominion War the main plot of the show, and adopting a serialized format.
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When Nana Visitor became pregnant, her condition was explained away in the show by having Kira become an emergency surrogate for Keiko O'Brien's baby. Astonishingly, Visitor was only absent for one episode (Star Trek: Deep Space Nine: Let He Who Is Without Sin... (1996)) due to the birth of her son. She actually cut her maternity leave short, out of fear that a prolonged absence would cause the writers to significantly reduce her role in the rest of the series.
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Wolf 359, mentioned as the battle site between the Borg and the Federation where Sisko lost his wife, is a real star that is seven and a half light-years from Earth.
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Constable Odo was originally envisioned as a young Clint Eastwood type. When Rene Auberjonois was called in for his audition, the casting director told him that none of the previous actors had been "grouchy enough". So Auberjonois improvised his lines using his most gravelly voice, and secured the role. Odo's scoff eventually became such a character trademark that the screenwriters would often script it into his lines (as "harrumph!"), much to Auberjonois' annoyance.
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Although all "Star Trek" series dealt with complex social issues, "Deep Space Nine" had darker undertones and seriously dealt with genocide, terrorism, bigotry, P.T.S.D., and the consequences of war, much more than other Star Trek series. The writers also found that due to the static environment of a space station, it was much easier to have the characters deal with the long-term consequences of their actions, as opposed to a starship crew, who would be in different locations each week.
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Michael Dorn did not want to reprise his role as Worf, since the daily make-up application was exhausting, and he was relieved to be able to move on. Dorn said that the salary he was offered made him reconsider.
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After production ended, and the sets were dismantled, the Defiant bridge set was declared "fold and hold" and placed in storage. It was re-dressed and used as the bridge of an alien cargo ship and a Klingon battlecruiser on Star Trek: Voyager (1995) and the bridge of the ECS Fortunate on Star Trek: Enterprise (2001).
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Malcolm McDowell, who had been in Star Trek: Generations (1994), once said he'd like to appear on this show, but only if his nephew, Alexander Siddig (Dr. Bashir), would direct the episode. Such a chance was offered in season five, episode eighteen, "Business as Usual", but never materialized due to scheduling conflicts.
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The name "Deep Space Nine" originated from an early working title, and pre-dated the decision to set the series on a space station. Producers intended on coming up with a new title after the show was fully developed, but stayed with the name, feeling it had an intriguing quality to it.
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The character of Morn (Mark Allen Shepherd), the Lurian bar patron who is always seen sitting at Quark's bar, was written as a nod to the character of Norm Peterson, played by George Wendt on Cheers (1982). Morn is an anagram of Norm. The mask worn by Shepherd originally had no opening for the mouth, so make-up artist Michael Westmore gave him lips over the course of the series, in case the character needed to speak. Unfortunately, Morn never said one word during the entire run of the show, leading to a running gag where bar patrons, station crew members and civilian residents often mention that Morn is excessively talkative off-screen, and "never shuts up."
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With the show debuting shortly after the 1992 Presidential election, some television viewers who were largely unfamiliar with the Star Trek franchise mistakenly believed that Quark was a lampoon of Independent Presidential candidate Ross Perot (short height, large ears, financially minded or obsessed). That was obviously not the case, as the Ferengi appeared in Star Trek: The Next Generation (1987) Star Trek: The Next Generation: The Last Outpost (1987), five years before Perot announced his candidacy.
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In Star Trek: Deep Space Nine: Trials And Tribble-ations (1996) when Sisko and Dax see Kirk and Spock, Dax has the hots for Spock. In August 2017, Terry Farrell (Jadzia Dax) got engaged to Adam Nimoy, son of Leonard Nimoy (Spock).
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Despite being credited as a regular, Cirroc Lofton appeared in only eighty-five of the show's one hundred seventy-three episodes. Morn (Mark Allen Shepherd), the most frequent recurring character, appeared in ninety-two episodes. Curiously, Sheppard isn't credited with this total on DS9's cast listing.
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Jadzia Dax was originally supposed to have a forehead appliance as the Trill were first shown in Star Trek: The Next Generation: The Host (1991), but after a test, most people thought that Terry Farrell's face was much too beautiful to be partially covered by or with prostheses. Instead, she got to have spots on the side. They were drawn on personally by Michael Westmore each day, a process which initially took over an hour, but over time, this eventually was reduced to close to forty minutes. Westmore actually "signed" his work by adding two spots in the shape of an M and a W. From then on, all Trills were shown to be like this, rather than the version shown on Star Trek: The Next Generation (1987).
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Marc Alaimo was nicknamed "The Neck" on-set for his naturally long neck, which inspired the look of the Cardassian neck ridges.
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Amongst the actors to read for the role of Captain Sisko were Carl Weathers and Eriq La Salle. James Earl Jones and Tony Todd were offered the role but declined. Todd (who appeared as Worf's brother Kurn on Star Trek: The Next Generation (1987)) made two appearances on this show; first as an elderly Jake Sisko in season four, episode three, "The Visitor", then as Kurn in season four, episode fifteen, "Sons of Mogh". He appeared in Star Trek: Voyager (1995) season four, episode sixteen, "Prey".
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When the Nielsen ratings started to go down during the broadcasting of the third season, the studio pressed for radical ideas for the fourth season to increase the show's popularity again. Some of their suggestions included blowing up planet Bajor, or taking the action away from the station. They finally decided that the show needed a popular character from an earlier Star Trek series. Initially, the producers weren't too pleased, because they had set up a subplot within the Dominion War storyline where the Federation would be facing off against the Klingons, and were already having difficulties making it work. However, the studio decision turned out to be a blessing in disguise when someone suggested to introduce The Next Generation's Worf (Michael Dorn) to the cast as an intermediate between the Federation and the Klingons, which conveniently solved most of the script problems.
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Majel Barrett guest starred in a handful of episodes reprising her role as Lwaxana Troi from Star Trek: The Next Generation (1987). This made this show the last Star Trek series or project in which Barrett would make an on-screen appearance. Barrett continued to play the computer voice for this show and Star Trek: Voyager (1995), and did so for Star Trek: Enterprise (2001) and Star Trek (2009). Through this show, Barrett played on-screen roles in each Star Trek incarnation.
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Alexander Siddig originally auditioned to play the part of Sisko. Rick Berman thought that Siddig was too young for the part, and felt him to be a better fit to play Bashir instead.
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The primary design of Deep Space Nine was based on a gyroscope, but with the top and bottom parts removed. Some of the earlier designs by Herman F. Zimmerman had complete hoops, also like a gyroscope, and the idea was that rotating the station would create artificial gravity, until someone pointed out that there was no need for this, as Star Trek ships use gravity generators. However, the idea of a halo-shaped space station stuck, and it was used in the final design.
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Dax was originally envisioned as an alien from a low-gravity world forced to get around in a wheelchair and who flew around her quarters. The concept was scrapped because the "flight" cables were too difficult to rig. However, the idea was revisited in Star Trek: Deep Space Nine: Melora (1993) featuring a guest character.
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Star Trek: Deep Space Nine: Trials And Tribble-ations (1996), a time travel story, was written to mark the 30th Anniversary of the Star Trek franchise. The DS9 crew travels back to 2268 at the time of Star Trek (1966) episode 2.15, Star Trek: The Original Series: The Trouble with Tribbles (1967), to prevent Arne Darvin from assassinating Captain Kirk and changing the timeline. Due to the ages of William Shatner, Leonard Nimoy and the other original cast members, it was decided to have this show's cast interact with the original footage of the Star Trek: The Original Series (1966) episode. Bluescreen and computer technology were used that had recently been employed for Forrest Gump (1994), another Paramount property.
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Joseph Sisko, father of Benjamin and grandfather of Jake, was played by Brock Peters, who played Admiral Cartwright in Star Trek IV: The Voyage Home (1986) and Star Trek VI: The Undiscovered Country (1991).
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The name of the alien race "Ferengi" is derived from the Persian word for "foreigner", which is Farangi.
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Military ranks used in Star Trek are all based upon actual military ranks. Starfleet ranks are those of the Royal Navy: Ensign, Lieutenant Junior Grade, Lieutenant, Lieutenant Commander, Commander, Captain, Commodore, Rear Admiral, Vice Admiral, and Admiral. Bajoran ranks are the same as those used in the U.S. Army, Air Force, and Marines: Lieutenant, Major, Lieutenant Colonel (or, as the Bajorans call it, "Field Colonel"), Colonel, and General. (Kira, after her promotion, was referred to simply as "Colonel", but she was promoted two steps in rank at once.) Klingon ranks are "bekk" (an enlisted rating), Ensign, Lieutenant, Commander, Captain, Colonel, Brigadier, General, and Admiral. Cardassian ranks are based on those of the ancient Roman Empire: Gil (equivalent to a Starfleet/U.S. Naval Lieutenant), Glinn (Commander), Gul (Captain), and Legate (Admiral).
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The tankards used for Klingon bloodwine are actually measuring cups used in baking.
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The appearance of the Trill symbiont is different from when it initially appeared on Star Trek: The Next Generation (1987) season four, episode twenty-three, "The Host". In that episode, the symbiont's appearance was made to resemble a caterpillar with the head of an octopus. According to Make-Up Supervisor Michael Westmore, the symbiont was re-made for this series to be more "stream-lined" to make it easier to handle. Also, the appearance of the Trill hosts had changed as well. In "The Host", the Trill people had semi-ridged foreheads and no body spots, but in this series, they have normal foreheads, and body spots. In "The Host", the Trill was also terrified of being transported, insinuating that it would damage the symbiont, but none of the Trills ever mentioned concerns with being transported.
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According to numerous episodes, time on the Deep Space Nine space station is based on the length of a standard Bajoran day, which is twenty-six hours.
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From the fourth season on, the writers felt that they enjoyed an unprecedented amount of freedom in coming up with ideas for their Dominon War story arc. The first seasons of this show had run simultaneously with the last seasons of Star Trek: The Next Generation (1987), so they had to maintain continuity with the latter show's story developments. After Next Generation wrapped in 1994 and Star Trek: Generations (1994) was released, there were no immediate plans for more theatrical movies, and Star Trek: Voyager (1995) wouldn't be directly affected, as it took place in the Delta Quadrant. The writers thus felt that they could take the main storyline in any direction, and decided to stir up the peaceful status quo of the Alpha Quadrant, by pitting several of its groups against each other.
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The Dominion War storyline proved to be very divisive among veterans of the "Star Trek" universe. George Takei, in particular, voiced his belief that the storyline was directly antithetical to Gene Roddenberry's original concept of a peaceful, Utopian future.
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The design of Ops incorporates ideas that were considered, but dropped for The Bridge on Star Trek: The Next Generation (1987), such as the upper level office, the briefing table in the center of the room, and the transporter being built into the set.
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Alexander Siddig's and Nana Visitor's son Django was born during production of season five, episode seven, "Let He Who Is Without Sin...", in September 1996.
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The Maquis was the name of the French resistance fighters during World War II.
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Robert Patrick was considered for the role of Odo, but it was felt the character would be too similar to Robert Patrick's role in Terminator 2: Judgment Day (1991).
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Lit Star Trek model kit parts can be seen as medical instruments throughout the series. In one episode, Dr. Bashir uses a part that makes up a Romulan Warbird engine nacelle to scan or heal.
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Worf and Jadzia Dax were the first pair of regular Star Trek characters to be married to each other. The episode Star Trek: The Original Series: Balance of Terror (1966) had a marriage ceremony between two guest characters that was prematurely canceled and never finished due to the death of the man in the same episode, so the makers of DS9 wanted to have a formal union that would last for a while. Tom Paris and B'Elanna Torres eventually got married on Star Trek: Voyager (1995), and Star Trek: The Next Generation (1987) alumni Riker and Troi were married in Star Trek: Nemesis (2002). O'Brien was only a recurring character at the time of his marriage on Star Trek: The Next Generation (1987) season four, episode eleven, "Data's Day", and his wife Keiko was not a regular character on either Star Trek: The Next Generation (1987) or this show.
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References are frequently made to Starfleet "ground troops", and some Starfleet characters have different uniforms (a black uniform with a small colored stripe across the middle). Fans generally accept that these characters are part of a Starfleet Marine Corps; this was an idea which Gene Roddenberry conceived for Star Trek: The Original Series (1966), but never found an opportunity to use until the movie Star Trek V: The Final Frontier (1989) where the men accompanying Kirk and crew down to Nimbus III were later confirmed to be marines. There was a Starfleet Colonel West in Star Trek VI: The Undiscovered Country (1991), who was most likely a Starfleet Marine since the rank of Colonel doesn't exist in naval organizations. Colonel West was played by Rene Auberjonois, who played Constable Odo on this show. The existence of Starfleet Marines was finally explicitly shown and stated on-screen in Star Trek: Enterprise (2001), indicating that they have been around in the Star Trek universe since at least 2153.
The square glasses used in Quark's bar are actually candle holders turned upside down.
As he had on Star Trek: The Next Generation (1987), Q was intended to make semi-regular appearances on this show, but appeared only in season one, episode seven, "Q-Less". Q instead would come to continue his appearances on Star Trek: Voyager (1995). In addition, producers announced Whoopi Goldberg would reprise her role as Guinan in a guest appearance or two, and intended to have Leonard Nimoy appear as Spock, but the plans never materialized. Some other recurring characters from The Next Generation would wind up making appearances on this show, however, including Vash (Jennifer Hetrick), Lwaxana Troi (Majel Barrett), Gowron (Robert O'Reilly), Worf's brother Kurn (Tony Todd) and the Duras Sisters (Barbara March and Gwynyth Walsh).
Buck Bokai's baseball card, a collectable featured on Benjamin Sisko's desk, had Keone Young on the front, in character, but showed "Trek" model maker Gregory Jein, who invented the "history" of the character, on the back. The pair bore an uncanny resemblance to each other.
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The uniforms initially worn on this show were designed to look different from those worn on its parent show, Star Trek: The Next Generation (1987), with a colored shoulder and a gray undershirt. Beginning with the movie Star Trek: Generations (1994), however, these new uniforms were adopted by Star Trek: The Next Generation (1987) crew, and Starfleet as a whole. This change was made when a new style of uniform designed for Star Trek: Generations (1994) was rejected. From the mid fifth season of this show and Star Trek: First Contact (1996) another type of uniform was issued by Starfleet (now with gray shoulders and colored undershirt), while Star Trek: Voyager (1995) (having no way of knowing about the change) retained the earlier version, distinguishing the two series from each other again. It is also worth mentioning that the DS9-style uniforms are very similar to the ones worn by Starfleet cadets in The Next Generation, most notably in season five, episode nineteen, "The First Duty".
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The role of Jadzia Dax was initially offered to Famke Janssen, whose character make-up from Star Trek: The Next Generation (1987) season five, episode twenty-one, "The Perfect Mate" inspired the change in Trill character make-up from a forehead prosthesis. She turned down the role in order to remain available to appear in theatrical movies.
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Jeffrey Combs has the distinction of portraying eight different characters on various Star Trek series. He played the roles of Brunt, Weyoun, Shran, Tiron, Kevin Mulkahey, Penk, Krem, and a holosuite guest. He is one of only five actors to play seven or more different characters in the Star Trek franchise, the others being Randy Oglesby, J.G. Hertzler, Vaughn Armstrong, and Thomas Kopache. Coincidentally, Combs has appeared on Star Trek with all four of those actors.
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The character that eventually became Vic Fontaine was written for Frank Sinatra Jr. in season four. Sinatra, despite being a fan of the show, turned it down, declaring that he only wanted to play an alien. After meeting with Robert Goulet, and attempting to get Steve Lawrence, Tom Jones, and Jerry Vale, the producers eventually decided on James Darren in season six. Darren appeared in eight episodes.
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The U.S.S. Defiant was first envisioned to look like a beefed-up version of a runabout. When that didn't work out, they used an existing design for an alien cargo ship as basis, and developed it as a battleship. It was first called the U.S.S. Valiant, but Producer Rick Berman vetoed any name beginning with letter V, since he didn't want to create confusion with Star Trek: Voyager (1995), which they were setting up at the time. Defiant was chosen because like Enterprise, it was a name that had been used for a ship in Star Trek: The Original Series (1966) as well.
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Worf never refers to nor addresses Quark by name. From joining the crew in season four to the finale, Worf always referred to him as "the Ferengi bartender".
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The runabout vessels used on DS9 are named after rivers, i.e., Rio Grande, Yangtze, Mekong.
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The Jem'Hadar were described in the script as tough warriors who were almost impervious to phaser shots. Make-up Supervisor Michael Westmore immediately thought of the thick skin of rhinos and reptiles when he read that description, so he designed the Jem'Hadar to look like dinosaurs, specifically triceratops, complete with horns.
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This show featured the largest cast of recurring or semi-regular characters of any Star Trek television series.
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O'Brien and Worf were the only two regulars on a "Star Trek" series to be carried over from another. This was not to be repeated until 7 of 9 joined Star Trek Picard (2020)
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Jonathan Frakes has appeared in all of the live-action Star Trek (1966) spin-offs. In addition to playing the role of Commander William T. Riker on Star Trek: The Next Generation (1987), he also appeared on Star Trek: Voyager (1995) season two, episode eighteen, "Death Wish", as Commander William T. Riker. On this show, season three, episode nine, "Defiant", he reprised his role from Star Trek: The Next Generation (1987) season six, episode twenty-four, "Second Chances" as Thomas Riker. On Star Trek: Enterprise (2001) season four, episode twenty-two, "These Are the Voyages...", he reprised his role as Commander William T. Riker set during Star Trek: The Next Generation (1987) season seven, episode twelve, "The Pegasus".
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Quark and Odo were intended to be the 'Bones and Spock' of Deep Space Nine, the two crew members who were always at odds with each other. However, because Armin Shimerman and Rene Auberjonois spent so many hours together in make-up, they became such good friends that Shimerman felt that their fondness for each other seeped through in the later seasons, despite their best efforts.
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This is the only "Star Trek" television series not to have any human females as part of the main cast (with Kira being Bajoran and Dax being a Trill). Kasidy Yates and Keiko O'Brien were the only human female recurring characters in the show.
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There was a level of friction between fans of Babylon 5 (1993) and this show. Babylon 5 (1993) fans felt that writers for this show had stolen many aspects of Babylon 5's premise (occurring recently after a war or occupation, episodes taking place on a space station not located in Earth territory, the cast discovering an ancient malevolent race that would become a major threat, the overall story of the show being less reliant on story-of-the-week episodes, and more of an overarching story arc, et cetera), asserting that Paramount Pictures had rejected J. Michael Straczynski's proposal of Babylon 5 to them in the late 1980s, but used certain details of the pitch by inserting them into the story and premise of this show. There was a concerted effort to bury the hatchet, especially by having Majel Barrett (widow of Gene Roddenberry) appear on Babylon 5 as an alien prophetess who spoke on behalf of her recently deceased husband (a nod to Roddenberry, who had passed away a few years before her appearance).
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When Worf (Michael Dorn) joined the cast, there was no intention from the start to have him engage in a relationship with Jadzia Dax (Terry Farrell). However, everybody kept noticing how good the chemistry was between their two characters, so when the suggestion was made to pair them together, everyone felt it was the natural thing to do.
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Rene Auberjonois had originally envisioned Odo as a "kind of young John Wayne Sheriff-in-town."
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Terry Farrell admitted in an interview that Star Trek: Deep Space Nine: Blood Oath (1994) is a favorite episode, and she is a big fan of it because it revealed a great deal about Jadzia Dax.
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The number 47 pops up an inordinate amount of times on computer screens, serial numbers, dates and so on. This tradition was started by Writer and co-Producer Joe Menosky and was soon picked up by the rest of the production team. Menosky said that he chose that particular number because when he was a college student at Pomona College, Professor of Mathematics Donald Bentley proved as a joke that all numbers are equal to 47. Interestingly, Alias (2001) also featured the number 47 many times, and incorporated it into its on-going storyline.
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Executive Producer and co-Creator Michael Piller said that when coming up for an idea for the series concept of this show, there were initially three ideas considered: another starship adventure, a space station concept, and a remote frontier colony. The frontier colony idea was briefly considered, with the idea that since Star Trek: The Original Series (1966) was compared to Captain Horatio Hornblower (1951) in outer space, the new series would be compared to Gunsmoke (1955), but on a remote planet. The frontier colony idea was eventually dropped since it would've required a lot of on-location shooting, and the space station idea was ultimately developed instead.
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On occasion, sets from Star Trek: Voyager (1995) are used as other Starfleet locales. (For example: a holosuite grid in Star Trek: Deep Space Nine: Inquisition (1998), the entire U.S.S. Bellerophon (which was an Intrepid-class starship, same as Voyager) in Star Trek: Deep Space Nine: Inter Arma Enim Silent Leges (1999).
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Aron Eisenberg was approaching his mid twenties when cast as Nog, who began on the series in his pre to early teens. In addition, Eisenberg is seventeen years younger than Max Grodénchik, who played Nog's father Rom (an appropriate difference in age between father and son).
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Dr. Julian Bashir's last name was originally Amoros, and he was intended to be of Spanish or Hispanic descent. The name was not changed until the series pilot, Star Trek: Deep Space Nine: Emissary (1993), went into pre-production. Alexander Siddig said that he was very happy that the writers were bold enough not to write a backstory for Bashir, so that he wasn't shoehorned into an ethnicity and his character could pass for Arabian, Mediterranean, Hispanic or even Indian.
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The Danube class runabouts seen in the series are the only class of starfleet vessels to have a canonically established naming convention. Each ship in the class is named for a river on Earth. Examples include the Rio Grande, Ganges, Yukon, Yangtze Kiang, and Mekong.
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Regarding season six. Producers noted virtually no negative reaction to the romantic pairing and eventual wedding between Worf and Dax, which was essentially interracial. Producers cited that on the generally open minded nature of the Star Trek fan base. As was the case with all other Star Trek programs, the series depicted several mixed race (or species) romances, notably married couples O'Brien and Keiko, and Rom and Leeta.
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In the narrative behind Commander Sisko's original hatred for Captain Picard: Sisko blames Picard for the death of his wife Jennifer, who was killed in the Battle of Wolf 359. Picard had previously been abducted and assimilated by the Borg just prior to the Battle of Wolf 359, and was used as the Borg's 'spokesperson'. This was shown in Star Trek: Deep Space Nine: Emissary (1993). Sisko later made his peace with Picard, after realizing Picard wasn't responsible for his actions while being assimilated.
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The Bajoran monetary system uses the Lita as currency. The Lita is actually the name of the currency of Lithuania. This country was occupied by the Russians from 1795 to 1918, and again from 1940 to 1991, much as Bajor was occupied by the Cardassians.
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Regarding season seven. O'Brien was the first regular Star Trek character to be established as being married from the start of a Trek series. (He had gotten married in Star Trek: The Next Generation: Data's Day (1991) as a recurring character on Star Trek: The Next Generation (1987)). In addition, Sisko was the first Star Trek Captain to be permanently married when he wed Kassidy Yates.
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Andrew Robinson (Garak) was earlier considered to play Decker in Star Trek:The Motion Picture.
When designing the space station, illustrator Michael Okuda came up with a sprawling, asymmetrical design inspired by an oil rig. He was quite proud of it, but producer Rick Berman didn't like it. He told Okuda that ultimately the design needed to be something simple that an eight year old could draw, and still be recognized. With this idea in mind, Okuda conceived the final design.
It is frequently stated that there are 285 official Ferengi 'Rules of Acquisition', although only 44 were ever mentioned in Deep Space Nine and subsequent Star Trek series. Because of fans continuously asking for a complete list, and knowing that someone would otherwise make one sooner or later, Ira Steven Behr finally took it upon him to write 'The Ferengi Rules of Acquisition' (ISBN 0-671-52936-6), credited as "By Quark as told to Ira Steven Behr."
One of the original ideas of the station was based on the Biblical Tower of Babel, meaning that it had been created over as long as three thousand years, through the co-operation of many different alien races who could not effectively communicate with one another, using different technologies that were often incompatible with each other. It was finally decided that the space station would be Cardassian in design, with lots of circular design elements.
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"Benjamin Sisko" was ranked #50 in TV Guide's list of the "50 Greatest TV Dads of All Time" (June 20, 2004 issue).
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The "Star Trek Crews" from all of the Star Trek series were ranked #2 in TV Guide's list of the "25 Greatest Sci-Fi Legends" (August 1, 2004 issue).
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Armin Shimerman had introduced the Ferengi into Star Trek lore in the episode Star Trek: The Next Generation: The Last Outpost (1987), when the Ferengi were still intended to be an antagonistic race. However, over time, the Ferengi started to serve more and more as comic relief characters. Shimerman later said that he regretted his mean-spirited, one-dimensional performance in The Next Generation, and took it upon himself to flesh out the Ferengi and their culture as much as possible throughout Deep Space Nine's run.
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Mariska Hargitay auditioned for the role of Jadzia Dax.
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Sisko's middle name is Lafayette.
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The first Star Trek series with main characters who were not members of Starfleet. Odo and Kira Nerys were members of the Bajoran Militia, while Quark and Jake Sisko were civilians.
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"Raktajino", the often featured Klingon coffee beverage and favorite of the DS9 crew, is mentioned 47 times during the entire series. Whether this was another purposeful "47" reference is unknown.
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The series takes place from 2369 to 2375.
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Among the finalists for the role of Sisko was Gary Graham, best known for the television series Alien Nation (1989). Graham had a recurring role as Vulcan Ambassador Soval on Star Trek: Enterprise (2001).
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Debuting in January 1993, the first Star Trek series to premiere during television's mid season. Star Trek: Voyager (1995) also premiered mid season.
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When the series was first announced, there were rumors among the Star Trek: The Next Generation (1987) fan base that Wil Wheaton would return as Wesley Crusher.
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Rene Auberjonois played Colonel West in Star Trek VI: The Undiscovered Country (1991).
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The only Star Trek spin-off produced between 1987 and 2005 in which Commander William T. Riker didn't appear, although Jonathan Frakes made a guest appearance in Star Trek: Deep Space Nine: Defiant (1994), as Thomas Riker, William's evil "twin".
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After Avery Brooks was cast as Commander Sisko, producers maintained a color blind approach to casting Jake.
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Each of the three live-action Star Trek series after Star Trek: The Original Series (1966), which are set in the twenty-fourth century, had a cameo appearance by a character from its predecessor series in its premiere episode. In this one, "Emissary" has a cameo by Star Trek: The Next Generation (1987)'s Captain Jean-Luc Picard, played by Sir Patrick Stewart.
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Buck Bokai, Sisko's favorite baseball player of the twenty-first century, who broke Joe DiMaggio's record for consecutive hits in 2026, comes from Star Trek: The Next Generation: The Big Goodbye (1988).
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Star Trek: Deep Space Nine: Past Tense, Part II (1995)(#3.12), was the final episode before the debut of Star Trek: Voyager (1995).
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This is the only "Star Trek" television series not to receive any competitive Saturn Awards.
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Cast members frequently name Star Trek: Deep Space Nine: Far Beyond The Stars (1998) as one of their favorite episodes, due to the 20th century setting, and because some could finally appear on the show without excessive make-up, like Armin Shimerman (Quark), Rene Auberjonois (Odo), Michael Dorn (Worf), Jeffrey Combs (Weyoun) and Marc Alaimo (Gul Dukat). In fact, writer Ira Steven Behr got very confused during production of this episode because he had trouble recognizing Shimerman without his usual Ferengi make-up.
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Producers toyed with casting a woman as Sisko. The idea of a female lead and commanding officer was successfully revisited for Star Trek: Voyager (1995).
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Fans of the series were referred to as "Niners".
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Robert Walker Jr., who guest starred on Star Trek (1966) season one, episode two, "Charlie X", was offered a guest role during the sixth season, but did not want to come out of retirement.
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Terry Farrell later got engaged to Adam Nimoy, son of Leonard Nimoy.
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Ferengi males are often shown wearing headdresses on the back of their heads, but some, like Quark, never wear a headdress. Aron Eisenberg responded to a question about it on Twitter saying, "It's because our prosthetic head only reached to the just above the neckline and they needed something to help cover it up, hence the headdress. Armin Shimerman's head reached further than his neckline to under his clothing. So, there you go!! It was all about the make-up."
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The writers stated that the greedy and money-obsessed Ferengi were meant to be a reminder for the 23rd century humans on the show of how their own species used to be in the 20th century. Over the course of the series, the writers also explored the good sides of Ferengi culture, such as their tight family relations and their relatively peaceful disposition.
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Michael Zurich played the recurring part of a Bajoran Security Deputy in the first three seasons of this show, and became a name in the official Star Trek customizable card game: Kallis Ven.
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In the series, Odo is Cardassian for "unknown sample", because at the time he was found, the scientists did not know what the liquid substance was. Odo is a shapeshifter. This explanation was mentioned in several episodes, such as Star Trek: Deep Space Nine: The Begotten (1997) and season seven, episode fourteen, "Chimera". "Odo" is also an abbreviation for "odometer".
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Kevin Grevioux played the recurring part of a nameless Security Officer in the first three seasons of this show, but was only given a name in the official Star Trek customizable card game: Taylor Moore.
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James Earl Jones was considered for the role of Benjamin Sisko. Jones is, of course, famous for having voiced another famous science fiction character, Darth Vader, the father of Luke Skywalker. Sisko's father was played by Brock Peters, who also voiced Darth Vader in the NPR adaptation.
Morn was modeled after Norm, the character played by George Wendt on Cheers (1982). That series featured two Star Trek actors: Kirstie Alley and Kelsey Grammer.
Alexander Siddig is the nephew of actor Malcolm McDowell, who appeared in Star Trek: Generations (1994). Another uncle and nephew appeared in the Star Wars series: Denis Lawson is the uncle of Ewan McGregor, who played the young Obi-Wan Kenobi. Siddig and McGregor have something else in common: Siddig appeared in A Dangerous Man: Lawrence After Arabia (1992) as Prince Fisal, a character who, like Obi-Wan Kenobi, was previously played by Sir Alec Guinness.
In a February 2021 interview with ScreenRant, Rick Berman stated that "Brandon Tartikoff, an executive at Paramount studios, originally pitched the idea of doing "The Rifleman in space" as a good premise for the new show." While the producers didn't pursue that concept very far, there are similarities in the characters of Rifleman's Lucas and Mark McCain and their counterparts on DS9, Ben and Jake Sisko.
Avery Brooks was best known for his role on Spenser: For Hire (1985), in which he worked with Robert Urich. Urick had two connections to Star Trek. His wife, Heather Menzies-Urich, appeared in [loink=tt0059742]. Director The Sound of Music (1965) also directed Star Trek: The Motion Picture (1979), and her character's father was played by Christopher Plummer, who appeared in Star Trek VI: The Undiscovered Country (1991). Secondly, Urick also appeared in the mini-series Lonesome Dove (1989). One of the lead characters, Woodrow Call, also appeared in the prequel Comanche Moon (2008), and was played by Karl Urban.
Rene Auberjonois, Brock Peters, and Michael Dorn all previously appeared (in different roles) in Star Trek VI: The Undiscovered Country.
DS9 fans initially believed the characters Furel (a member of Major Kira's resistance cell) and Enabran Tain (retired head of the Cardassian's Obsidian Order) were played by the same actor due to their nearly identical voices and frame. However, they're played by two different actors, William Lucking and Paul Dooley respectively.
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Like Masters of the Universe (1987), guest actor Frank Langella took the role of Minister Jaro for his kids.
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Scott Barry played the recurring part of a nameless Bajoran Officer on this show, but was only given a name in the official Star Trek customizable card game: Nalan Bal.
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There had been speculation that the classic television series Bonanza (1959) may have been a possible influence behind the series. The lead character played in that series by Lorne Greene was called Ben Cartwright.
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Throughout the show, Quark has a total of 14 different outfits (seven main suits; two vacation outfits featured in "The Jem'Hadar" in Season 2 and "Let He Who is Without Sin" in Season 5; one pair of pajamas; two Klingon outfits featured in "Looking for Par'Mach in all the Wrong Places" in Season 5; a black "Mirror Universe" suit in "Cross Over" in Season 2; his Lumba disguise featured in "Profit and Lace" in Season 6; and his baseball uniform featured in "Take Me Out to the Holosuite" in Season 7. He also wears three different sleeveless overcoats; the first being his purple Nagus cloak in "The Nagus" (Season 1) and the other two being his furred Klingon marriage overcoat and his grey Klingon House shawl in "House of Quark" (Season 3).
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Frank Langella later worked with future Star Trek: Enterprise (2001) actor Jolene Blalock in Jason and the Argonauts (2000) which they played father and daughter Aertes and Medea.
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Star Trek: Voyager: Equinox, Part II (1999)(#6.1) was the first episode to air after the finale of this series.
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The series is about Ben Sisko living with his son Jake on the DS9 space station during the Dominion War. The series premiered the same year as Dr. Quinn, Medicine Woman (1993) which in that series, Jane Seymour starred as a doctor who relocates to a frontier town with her three adopted children during the American Civil War.
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Benjamin Sisko is the first commanding officer of a Star Trek series who doesn't start out with the rank of Captain at the beginning of the series. For the first three seasons, Sisko held the rank of Commander. It wasn't until the season three finale, "The Adversary", that he was finally promoted to Captain. This would not be repeated until Star Trek Discovery with Commander Saru.
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Regarding the end of season six: Terry Farrell was the first regular Star Trek actor or actress not to return in any way after her character was killed off. Charles 'Trip' Tucker III (Connor Trinneer) from Star Trek: Enterprise (2001) would be the second (although his death occurred in the series' finale, leaving little opportunity to bring him back afterwards). Leonard Nimoy's Spock died in Star Trek II: The Wrath of Khan (1982) but was resurrected in Star Trek III: The Search for Spock (1984); Denise Crosby's Tasha Yar died in Star Trek: The Next Generation (1987), but made several more appearances in the show in flashbacks and alternate universes, and as Tasha's adult daughter; James Kirk (Chris Pine) died in Star Trek Into Darkness (2013), but was revived in the same movie; and during the run of Star Trek: Voyager (1995), all principle characters have died at least once in alternate timelines or freak experiments.
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Regarding season seven. Numerous fans were initially reluctant to accept Nicole de Boer as the new host for the Dax symbiont after Terry Farrell's departure from the show, rather derisively referring to de Boer as "Ally McTrill", due to her slightly neurotic personality resembling Calista Flockhart's Ally McBeal (1997).
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Regarding the end of season six: Terry Farrell left the series when her contract expired and the producers were unwilling to meet her demands for her to stay on for another season. Farrell later claimed that she would have been willing to make guest appearances in season seven, but never did, as her character was killed off.
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It's revealed in Star Trek: Deep Space Nine: Doctor Bashir, I Presume (1997) that Dr. Bashir was genetically enhanced by his parents to have a superior intellect. Tampering with intelligence is specifically forbidden, as the disastrous consequences once led to the Eugenic Wars mentioned in Star Trek: The Original Series: Space Seed (1967). However, genetic engineering is not illegal per se, as evidenced by Star Trek: Voyager (1995) where both Chakotay and B'Elanna Torres' unborn daughter were confirmed to have been treated for genetic defects.
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Some fans of the show were confused by Jadzia and Curzon Dax, and that Commander Sisko calls Jadzia Dax "Old Man", and wrongly assumed that Curzon Dax and Jadzia Dax are the same person. It's established in the series that Trills have slug-like "symbionts" in their abdomen, which is transplanted from Trill to Trill upon death. The Dax symbiont was transplanted into Jadzia when Curzon Dax died. When the symbiont is transplanted into the new Trill host, the new Trill host inherits the previous host's memories. Jadzia is not Curzon, but a part of him lives on within her. Jadzia was twenty-eight when she became the new host of the Dax symbiont, and Curzon was over one hundred at the time of his death.
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