The future Data has gray hair, many cats (ironically, Brent Spiner hates cats) and can even use contractions now. He also seems emotional, suggesting he implanted Dr Soong's emotion chip, as in Star Trek: Generations (1994).
Picard's captaincy of the Enterprise is approved by Admiral Norah Satie. Satie made an appearance in Star Trek: The Next Generation: The Drumhead (1991), where she and Picard were at odds with one another over her paranoid belief in a Starfleet conspiracy.
There are parallels between this story and that of a 1979 Doctor Who (1963) episode, "City of Death," co-written by bestselling author Douglas Adams. Both feature a notion of time-splintering, the prevention of life evolving on Earth, and a scene of contemplating primordial ooze that will become the human race.
Data begins a long and tedious rant about the meanings of "burn the midnight oil..." at one point in the past. This is reminiscent of earlier seasons where Data would go on at length about something and have to be stopped.
There are some similarities to Q's last appearance in Star Trek: The Next Generation: Tapestry (1993) in so far as Picard is sent into the past and back to the present. The circumstances as well as the conclusion, however, are rather different.
Another future development is that the Klingons have conquered the Romulan Empire, and the Neutral Zone has been dissolved. It seems the alliance between the Federation and the Klingon Empire has also ended, perhaps because the Empire is eager to expand its territories. This is a plot line explored for a time in Star Trek: Deep Space Nine (1993), when, thanks to Dominion interference, the Klingons break off their alliance with Starfleet. When the Dominion plans to take over the Alpha Quadrant, the Klingons cease hostilities with Starfleet.
Ships can go up to warp 13 in the future. This somewhat contradicts Star Trek: Voyager: Threshold (1996), where warp 10 was established as the barrier between warp and transwarp. However, this barrier was never again mentioned afterwards and may have been a one-off idea by the writers; or the warp scale has once again been changed in the future, just as it had been during the transition from Star Trek (1966) to Star Trek: The Next Generation (1987).
Picard gets the idea for the tachyon scan from the future Data, and then suggests the same idea to the past and present Data. The same applies to the tomographic imaging scanner, but in reverse: the past Data suggests it to Picard, who passes on the idea to the present Data.
The warp 5 speed limit (Star Trek: The Next Generation: Force of Nature (1993)) has obviously been abolished in the future, since ships can go to warp 13. This suggests that a method to stop warp drive destroying space has been found, although it is never brought up.
A future rendering of the Caduceus can be seen in several places on the bridge of Beverly's ship, erroneously used for the Greek symbol for medicine. In actuality, the rod of Asclepius (one snake, one staff, no wings) is the correct Greek symbol for medicine.
Production on Star Trek: Generations (1994) began while the episode was made. The scenes filmed were on the Enterprise-B set. After production wrapped on the series finale, the cast got a ten-day break before jumping back in to work on the film.
When this episode was written, the drafts would often get mixed-up with those for Star Trek: Generations (1994). Meaning the stories would sometimes get confused with one another. The writers later admitted that of the two, All Good Things... was the superior effort.
Worf and Deanna's romance, hinted at throughout the season comes to its fruition here. In the future we see, Deanna is dead, and she never got together with Worf. Probably because of Riker, who is clearly uncomfortable with it when he sees the two of them together in the present. This drove a wedge between them. The circumstances of her death are not known. The relationship between Worf and Deanna seems to have petered out because there is no mention of it in the films, and Riker and Deanna later married, as would Worf to Jadzia Dax in Star Trek: Deep Space Nine (1993). Worf may have discontinued the relationship out of respect for Riker.
The first time Picard comes to the senior staff poker game. An alien duplicate of Picard did it in Star Trek: The Next Generation: Allegiance (1990) but didn't join in. In both episodes, a crew member says Picard was always welcome to join. Also the only time where the entire senior staff play the poker game all at the same time.
After its initial release as a 2-hour season finale, this episode was edited for syndication into two hour long episodes with some scenes deleted. These include: Geordi telling Picard about his wife Leah and his children while tending to the vines. A part of the exchange between Ambassador Picard and Worf at their initial encounter (after Worf has cursed until the moment he allows the Pasteur to cross the border). Deanna telling Picard about her former relationship with Riker, and Picard then trying to order a cup of Earl Grey. Part of the exchange between Picard and Tomalak. Beverly Picard doubting the reality of her ex-husband's claims during their discussion in her ready room. An important exchange on the Pasteur between Picard and Q, in the guise of an old man. Beverly Picard ordering Worf to signal their surrender during the Klingon attack. A crewman on the "future" Enterprise reporting that the cloaking device isn't functioning. Dr. Crusher tending to Geordi and Ogawa, before Picard enters sickbay. Parts of the scene where Q takes Picard to prehistoric France. A scene on the "future" Enterprise of Picard wandering through the ship and asking a low-ranked crewman the way to Ten Forward. And Picard thanking Q for his help at their final exchange. Also, a short recap "Last time on Star Trek: The Next Generation (1987)" was added to the beginning of the second part in place of the teaser.
Nurse Ogawa's pregnancy, last mentioned in Star Trek: The Next Generation: Genesis (1994), resurfaces here. In an alternate timeline, the tachyon pulse from the ship's deflector responsible for the anomaly causes her to have a miscarriage. But once the anomaly collapses and time resets itself, this thankfully never comes to pass.
In the future, Picard and Beverly get married and then divorced. Although a possible romance is hinted at before the end, it was never followed up in any of the films - perhaps to avoid the future seen here.