For characters who debuted in Star Trek: The Original Series, see Characters.Star Trek The Original Series
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Admiral Lance Cartwright
Played by: Brock PetersA fairly pragmatic Starfleet admiral.
Admiral Cartwright (Brock Peters)
- Bitch in Sheep's Clothing: When one thinks of his role in The Voyage Home in revelation of his duplicity in The Undiscovered Country, it could be Cartwright's role as a Reasonable Authority Figure in his debut was nothing, but a facade from the beginning to hide his dark Hidden Agenda that was unrelated to the situation at the time of the fourth film.
- Face–Heel Turn: Becomes a villain in a couple movies later.
- Fantastic Racism: Against Klingons, whom he says will become "the alien trash of the Universe". For Peters, who was a civil rights crusader, it was painful for him to utter those lines, and had to be convinced to do it.
- Greater-Scope Villain: Downplayed in The Voyage Home, he has nothing to do with the plot other then showing nothing, but support towards Kirk and his mission. However, it could be his way to earn Kirk's trust to use him later for his darker plan.
- Manipulative Bastard: In The Voyage Home, he gains Kirk's trust and the trust of his comrades through his Reasonable Authority Figure act, which allows him to secretly participate in a conspiracy and using Kirk as a pawn in The Undiscovered Country.
- Named by the Adaptation: The novelization gives him the first name Lance.
- Reasonable Authority Figure: His role in the film is pretty small, but he seems fairly calm and level-headed in the face of a planetary catastrophe. Unfortunately, that disappears as soon as Klingons get involved...
- Sudden Sequel Heel Syndrome: In Star Trek VI: The Undiscovered Country, without any clear explanation, he becomes downright villainous in contrast to his past appearance to a point Peters is playing a completely different character in the latter Star Trek film and makes some Trekkies wonder if Cartwright in his debut was a Bitch in Sheep's Clothing all along who fooled us all with his Reasonable Authority Figure act.
- Suspiciously Similar Substitute: For Admiral Morrow. In fact, nearly all versions of the scripts did feature Morrow instead of Cartwright, who apparently was a last-minute replacement after Morrow's actor, Robert Hooks was unavailable.
- A common fan theory, backed up by the novelization, is that Morrow resigned due to the scandal that erupted with Kirk stealing the Enterprise.
- Villain of Another Story: In The Voyage Home, even though he does not show any villainy at all, though he could be good at concealing it, until The Undiscovered Country.
20th Century Individuals
Dr. Gillian Taylor
Played by: Catherine HicksA marine biologist specializing in the study of whales.
- Fish out of Temporal Water: She ends up accompanying Kirk and crew to the 23rd Century, and stays there. Though she could easily have been beamed back down to Earth before returning to their own era, Kirk decides to let her come along on the grounds that no-one in his century would have the first idea how to care for humpback whales.
- Temporary Love Interest: To Kirk. In fact, aside from his former partner Carol Marcus in the second film (whose relationship in that film isn't really romantic as such), she's the only love interest that he gets in any of the six original cast films.
- Your Universe or Mine?: Downplayed. There's no way Kirk can stay in the 20th Century due to the importance of getting the humpback whales to the future and saving Earth, and any desire that Gillian might have had to stay in her own time disappears when her boss releases the whales without informing her.
Played by: John SchuckThe Klingon ambassador to the Federation.
- Ass in Ambassador: "YOU POMPOUS ASS!"
- Everybody Calls Him "Barkeep": In both this film and Star Trek VI: The Undiscovered Country, he's only credited as "Klingon Ambassador." His actual name is never revealed in either film. However, he is indentified as Kamarag in their novelizations.
- Demands that Kirk be extradited to the Klingon Empire with a thinly-veiled insinuation that he'll be executed as soon as they get their hands on him. For the "crime" of killing a bunch of Klingons who were illegally in Federation space, and had likely killed far more people (specifically, the crew of the USS Grissom and David Marcus) than Kirk. Not surprisingly, the Federation council brush off his demands.
- Averted when he reappears in the sixth film, and is able to put his points across far more reasonably when the facts are (apparently) on his side.
- Large Ham: There's a reason why fans often call him the Klingon Hambassador.
- Named by the Adaptation: His name originates in the novelizations.
- The Rival: He apparently sees himself as this to Sarek. Not that Sarek himself seems to consider him worthy of that honor.
President Hiram Roth
Played by: Robert EllensteinThe President of The Federation.