Characters: Star Trek IV: The Voyage Home
For characters who debuted in Star Trek: The Original Series, see Characters.Star Trek The Original Series
Dr. Gillian Taylor (Catherine Hicks)
- 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 her 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.
Admiral Cartwright (Brock Peters)
- 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...
- 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.
Klingon Ambassador (John Schuck)
- 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.
- Jerkass: 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.
- Large Ham: There's a reason why fans often call him the Klingon Hambassador.
- The Rival: He apparently sees himself as this to Sarek. Not that Sarek himself seems to consider him worthy of that honor.