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Star Trek VI: The Undiscovered Country (1991) Poster

Goofs

Crew or equipment visible 

At 01:26:19 in the Special Edition, during the scene where Kirk, Spock, and McCoy trick Valeris in the sick bay, a member of the film crew is visible to the side (stage left).
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Audio/visual unsynchronised 

In the galley, just as Scotty exits, Spock orders: "Valeris, please inform Starfleet Command that our warp drive is inoperative." Yet Spock's lip movements seem to indicate that the name "Valeris" was dubbed over "Commander Uhura," which would make sense given that the latter is the ship's communications officer and she is standing right there, but was likely changed to match the subsequent dialogue and action: Valeris asks, "A lie?"; Spock replies, "An error"; then Valeris walks away as Spock continues to speak with Uhura.
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On Rura Penthe, McCoy's lips initially aren't moving when he says, "He's definitely on about something, Jim."
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When Scotty is reporting that the torpedo bay is "fully loaded" during the initial attack, the audio does not match the movements of his mouth in the reflection in the screen.
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Character error 

During Spock's briefing at Starfleet headquarters where Kirk learns he is going to meet with Chancellor Gorkon, one of the Starfleet officers refers to Admiral Cartwright as Admiral Carter.
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When Uhura is conversing with the Klingon listening post. The computer screen beside Uhura's head is displaying the real-time translation of the Klingon's dialogue. The scene was changed at the last minute to add comic relief. The special effects team had already made the computer screen animations, and there wasn't time to change them.
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Continuity 

When the shock wave from the Praxis explosion is first detected by one of the Excelsior's Bridge Officers, he informs Captain Sulu that the wave is approaching on the port side. At this point we see an exterior view of the Excelsior as the shock wave hits the ship from the starboard side.
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When Kirk reacts to the second torpedo fired at Kronos I his insignia pin is on the wrong side of his chest, revealing that the shot had been flipped.
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When the Klingons are being beamed aboard for dinner, Scotty changes position between shots.
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The name of the character "Uhura" is misspelled "Uhuru" in the end credits. Uhuru is the Swahili word for freedom, and Uhura is the "girly" variant created by Gene Roddenberry for the original Star Trek.
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Although it makes a neat visual effect, and there were artistic and literary reasons for it (see trivia), the idea that Klingons have purple-pink blood is technically an inaccuracy within the Trek Universe. All other Trek movies and shows have consistently made clear that Klingons have red blood just like humans.
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In the kitchen, when Lieutenant Valeris is demonstrating to Commander Pavel Chekov that it is impossible to fire an unauthorized phaser on board a starship, the cook carrying the tray dodges the phaser beam twice.
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Whilst Kirk is fighting with Martia, who appears as Kirk, they are rolling around on the ground near to McCoy. The camera pans out and shows that they are start rolling towards McCoy's feet as though they are going to roll over him from his feet upwards. The shot then changes to a close-up of McCoy and Kirk and Martia roll over McCoy from his left side to his right.
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When Spock puts the special detection patch on Kirk's shoulder, it is horizontal. But soon after, on the Klingon battle cruiser, it is vertical.
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When the Excelsior encounters the shock wave, Lieutenant Valtane starts next to Captain Sulu, then is shown near a console, then is shown moving *to* the console he was previously at.
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On board Excelsior at the beginning of the movie, the energy wave is coming in at "240 degrees mark six port." According to the Star Trek Technical Manual, this places the wave at 240 degrees clockwise from the front of the ship, and six degrees above that point. When Excelsior takes the hit from the energy wave, it strikes the Forward Starboard side, at about 20 degrees. (The shockwave itself originated from a point on a bearing of 323 degrees mark 75)
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When the Excelsior Communications Officer wakes Sulu, he is blinded by a bright light in his face. But the corridor behind him is dimly lit, certainly not bright enough to cause the blinding bright light in Sulu's face.
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At the beginning of the film, when the Excelsior encounters the energy wave created by the explosion of Praxis, Sulu's hair goes from being neatly groomed to mussed up back to neatly groomed between shots.
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When Sulu is telling Kirk the location of the peace conference, the monitors behind Kirk do not match with the image of Sulu in the main viewscreen.
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The clock on the bridge is frozen when Chang is talking through the speakers during the battle.
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During the trial, the position of Kirk and McCoy changes between shots.
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When the Enterprise crew observes the torpedo hit to the Excelsior, you can see red alert lights flashing on the bridge. But, when several crewmembers from the back of the bridge move to see the viewscreen, there are no lights flashing, and the ship appears to be on Condition Green.
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At roughly four minutes in, Sulu's tea cup is about to fall off the stand in the close up. However, in the shot of Sulu and the crew struggling with the turbulence, the cup is close to the center.
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The shock wave causes Sulu's cup and saucer to fall from, and land next to, the starboard side of the pedestal, but a later overhead shot shows the broken pieces in the forward port corner of the control pit.
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Azetbur, Gorkon's daughter, becomes Chancellor of the Klingon High Council. However, a major plot point in several episodes of "The Next Generation" is that women cannot even serve on the High Council. This is why neither Lursa nor her sister B'Etor can become Chancellor, leading to their efforts to overthrow the Empire and install their nephew as Chancellor. All three characters subsequently grow to have roles in future movies and spin-off series.
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The clocks in the bridge when Spock is questioning Lt Valeris.
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During Kirk and McCoy's trial, the clock on the Enterprise reads 11:15 when discussion is about how the assassins could be walking in zero-g, but after sentencing it reads 10:45.
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When Valeris is first revealed in the sick bay, there is no earring on her right ear. But in later shots, the earring suddenly appears.
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Factual errors 

McCoy says he doesn't even know Gorkon's anatomy. However, in the TV series episode, he determines that Arne Darvin is a Klingon by using his medical scanner.
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Incorrectly regarded as goofs 

After the explosion on Praxis, the shock-wave radiates in a flat plane, even though in space we should expect a spherical propagation (in all directions). Although the filmmakers were obviously more concerned with visual impact than physical correctness, a flat shock-wave is not impossible, if the exploding device had proper dynamical characteristics (and for all we know it might have). Even in nature highly non-spheric explosions do occur. One example is an eruption from a black hole, which propagates in just one dimension (in the form of two polar jets) rather than three.
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Valeris is referred to as "Lieutenant", even though she wears the rank insignia of a Lieutenant Commander. Although Lieutenant Commanders are usually called "Commanders", the "Lieutenant" alternative is occasionally encountered as well. Apparently, both references are acceptable by Starfleet regulations.
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In the opening scene, Sulu's tea cup faces its printed side toward the camera which looks at Sulu, then Sulu drinks from it, we do not see him place it down. We see the cup next from Sulu's perspective, which is clear because not only is the printed text missing, but the handle is now on the other side. Other than the text and the handle, there is no other reference in either frame to determine which way the cup is facing, so there is no goof.
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Plot holes 

Uhura's lack of knowledge of the Klingon language is at odds with her being Communications officer, since she should at least have some working knowledge of the language of the Federation's greatest rival. She once spent three months effortlessly handling the communications station on board the captured Klingon Bird of Prey in Star Trek IV: The Voyage Home, where all the controls were written in Klingon. (The filmmakers argued about this: see trivia.)
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When the Enterprise is shown approaching the planet with Camp Khitomer, there are no other ships or any other activity in orbit around the planet. Given the peace treaty talks taking place with so many VIP's from so many different species in attendance, there should be a considerable number of ships and perhaps even space stations and/or orbital defenses present in orbit around the planet from all species in attendance to protect the conference and its attendees.
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"All officers to the bridge" it's unlikely all of the officers assigned to Enterprise would fit on the bridge. Also most of the officers would be needed in their assigned spaces.
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It is never explained why the Romulans are participating in the peace conference. A Klingon-Federation alliance would be counter to Romulan interests.
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Revealing mistakes 

Rura Pente is supposedly so cold that a person's skin freezes when he is thrown to the ground, yet we do not see breath on any of the actors.
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In the locker room scene, the marks on the locker door where the magnetic boots are supposed to go can be seen (Velcro, painted the color of the locker).
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In the early scene in Kirk's quarters, the right eyebrow of Lieutenant Valeris becomes loose at the outer tip. The first time it is visible is at the line "Permission to speak freely, sir. It is an honor to serve with you." By her next line, "I've always wanted to try that, sir", the eyebrow has been reaffixed.
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When the Klingon vessel loses gravity and the officer's pistol comes out of its holster, the string pulling the weapon free can be seen.
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As Kirk and McCoy are descending the stairs into the prison on Rura Penthe, there is a trio of aliens watching them come down. Watch the green, lizard-like alien in the middle. If you look at the base of his skull on the back of his head, you'll see a triangular opening just above the collar of his coat. This is obviously the opening that would allow the actor to take his alien mask off.
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The large Wookiee-like prisoner with the feminine voice has long claws that look quite threatening, but upon a closer look, are made of soft rubbery material.
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Outside the trap door on Rura Penthe, the snow ripples under the characters' feet, making it obvious it is actually solid pieces of fake snow.
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No one's breath is ever visible on the ice planet Rura Penthe.
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Spoilers

The goof items below may give away important plot points.

Character error 

At Kirk's trial, the Klingon officer who lost an arm in Gorkon's assassination testifies "After the first shot we lost our gravitational field." However, only after the second torpedo hit on Kronos One are the Klingons shown to lose gravity.
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After Enterprise fires its tracking torpedo Chang stands surprised watching. It is unlikely he would have failed to order shields to be raised or some kind of evasive maneuver even if it was hopeless.
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When conferring with Valeris in the ship's galley about the possible whereabouts of the gravity boots, Spock dismisses Valeris' theory that they may have been left on the Klingon ship, explaining that "gravity had not been restored when the assassins beamed away. Without them, they would have floated off the Klingon transporter pads." This seems to indicate that the transporter would not have picked up anything floating around the pad when the transport was initiated.

However, an earlier shot of the assassins beaming off the Klingon ship clearly shows floating Klingon blood dematerializing during transport, and a later scene shows Chekov discovering Klingon blood in the transporter room, indicating that a transporter pad can lock onto floating objects. Therefore, Spock's dismissal of Valeris' theory, although correct, should not have happened out of hand.
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Continuity 

During the battle over Khitomer, Scotty is dressed in his engineering uniform, but moments later when the crew beams down to save the President he has changed into his standard uniform.
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When McCoy is giving CPR to Chancellor Gorkon, General Chang changes position between shots.
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When Kirk and McCoy are arrested, one of the Klingon guards put Kirk's hands into the handcuffs twice.
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When Lieutenant Valeris admits her guilt, stands in front of, and slightly to the left of, the main viewscreen where Kirk is talking to Sulu. Lieutenant Valeris appears in one shot, disappears in the next shot which is slightly closer to the screen, and then reappears on the third shot of the viewscreen at the original distance from it.
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In the briefing room of Kronos 1, after McCoy performed CPR on the Chancellor, the Chancellor is briefly revived. After he talks to Captain Kirk, and the Chancellor died, about 24 seconds lapse while everyone contemplates what has happened. Then the General clapped his hands to take Kirk and McCoy into custody. During the next couple of seconds, you see McCoy wearily collapsing down in a chair to the left of the Chancellor and the table his body was on. Yet in the next scene, a second later, McCoy is standing up and being placed into hand restraints.
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During the battle between Chang's cloaked bird-of-prey and the Enterprise, Excelsior flies in to provide an alternate target for the Klingons. From Chang's weapons console perspective the bird-of-prey is spatially located slightly above both ships when he locks target on Excelsior and gestures to his gunner to fire another torpedo. Following the shot of the torpedo leaving the Klingon ship's torpedo tube the torpedo is shown striking the Excelsior directly from below as if that was where the cloaked Klingons were in relation to Excelsior. The weapons console shows the location of the two ships in an overhead view relative to their overall positions in space. The console is not showing a direct point of view of the two ships.
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Spock's hands after the mind meld with Valeris.
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Crew or equipment visible 

During the assassination scene, after Chancellor Gorkon says "Find Chang!" the shadow of the camera can be seen on the left side of the screen in a shot of some doors opening.
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Factual errors 

As McCoy begins to examine Gorkon he says "He has a pulse we can move him... Help me get him on the table." The reason you do not move an injured person (or Klingon) has nothing to do with their pulse; it has to do mainly with spinal cord injury. If the injured person's back is broken allowing the back to bend or move can sever the spinal cord and cause paralysis or even if the neck is broken.
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Incorrectly regarded as goofs 

Whenever Martia changes shape, her voice always remains the same. Yet when she becomes Kirk, her voice changes to match Kirk's. She can (we must assume) control her voice at will.
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The recording of Kirk's log entry, heard during the trial, does not exactly match what Kirk says during the actual scene. He originally says, "I've never trusted Klingons and I never will, I could never forgive them for the death of my boy." In the trial it is played as, "I've never trusted Klingons and I never will, I've never been able to forgive them for the death of my son." It's possible this was intended to be a doctored recording which is a clue to the conspiracy.
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When Valeris is being questioned after her discovery she quotes Kirk's "Let them die" line despite the fact that only Kirk and Spock were present in the briefing room when the line was originally spoken. However, she could've learned that from her co-conspirators, who might have been eavesdropping on Kirk and Spock (after all they just left that room a minute earlier). Also, Spock could've told Valeris about Kirk's opinions for any number of reasons. Also, during the conversation in the briefing room, there is a female officer standing at parade rest behind Kirk by the door. It is possible this was Valeris waiting on Spock.
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Plot holes 

Kirk and McCoy are on trial for the death of Chancellor Gorkon. Yet, in Star Trek IV: The Voyage Home, the Klingons were demanding the extradition of Kirk for the death of Commander Kruge and his crew in Star Trek III: The Search for Spock, as well as the theft of a Klingon vessel. These charges are not mentioned at the trial. (The film makers wanted to include this plot element, but couldn't for practical reasons - see trivia.)
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When the gravity generator on the Klingon ship fails all the Klingons are helpless as the two intruders walk through the ship shooting everyone. As the Klingons are a warrior race it is very unlikely they would not have been trained in microgravity combat. At the very least they would have at least tried to use their side arms to mount a resistance.
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Uhura points out that Enterprise has "all that equipment" for cataloging gaseous anomalies, some of which Spock and McCoy use to modify a torpedo to find Chang's cloaked ship. However, it was Excelsior that had been cataloging gaseous planetary anomalies in the Beta Quadrant, not Enterprise.
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Gorkon tells Kirk, "Don't let it end this way, Captain." This would be an unlikely thing for Gorkon to say. As far as Gorkon knows Kirk is the one responsible for what has happened.
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Revealing mistakes 

In the brief scenes where Chancellor Gorkon is seen close-up floating in mid-air just before being shot, the wire with which he is being suspended is visible behind him.
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When Chang's bird of Prey is destroyed, the black wires holding the model are visible through the red smoke. In addition to that, a small piece of debris can be seen to bounce back into view because it ricocheted off the sound stage floor.
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See also

Trivia | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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