A few crossover appearances, such as that of Spock on The Next Generation and the time-travel of the crew of Deep Space Nine to the era of The Original Series were especially lauded by both fans and critics.
[3][4] Strange New Worlds episode "Those Old Scientists" features live-action appearances of Beckett Mariner and Brad Boimler from the animated Lower Decks series.
Critic Lincoln Geraghty cites this as an example of Star Trek's ongoing propensity for reverential recognition of earlier versions of the series.
[6] In a bit of rather glaring discontinuity, the character of Lieutenant Dimitri Valtane is shown to be both alive at the end of the film and dead in the episode.
Actor Tim Russ, who portrayed Tuvok, also made an appearance as a bridge officer from the same fictional time period, serving on the Enterprise-B in the feature film Star Trek Generations (1994).
The film Star Trek Generations brought Kirk and Picard, Enterprise captains from different centuries, together to defeat a common enemy.
Studios, Planet of the Apes DC Comics franchise, Green Lantern Dark Horse Comics, Alien IDW Publishing, Transformers (Star Trek – Legion of Super-Heroes also reveals that DC's Vandal Savage and Flint, a mysterious immortal encountered by James T. Kirk and his crew, are actually parallel universe versions of the same person.