Trivia

In the opening credits, there is a six-second-long pause between William Shatner and DeForest Kelley's names, where Leonard Nimoy's name would normally be. It's only one second between each of the other names.

The U.S.S. Grissom was named after astronaut Virgil I. Gus Grissom, who was killed when the Apollo 1 spacecraft caught fire on January 27, 1967, during a launch simulation test. The fire also killed astronauts Edward H. White II and Roger B. Chaffee.

When the Enterprise enters Spacedock at the film's beginning, just before Uhura (Nichelle Nichols) comments on the Excelsior's appearance ("Would you look at that!"), another docked ship can be seen, in shadow, at the upper left corner of the screen. This ship is one of the alternative models that was considered for use as the Excelsior. This alternate model also made several appearances on Viaje a las estrellas: La nueva generación (1987), usually as a wrecked ship or piece of space junk.

When negotiating Kirstie Alley's contract for Viaje a las estrellas II: La ira de Khan (1982), Paramount Studios did not offer or include any options or clauses regarding any possible sequels. According to director Leonard Nimoy, this left Alley open to negotiate a new contract for this film, resulting in Alley's excessive salary demands, which led to her being dropped and replaced by Robin Curtis.

George Takei initially expressed reservations regarding the scene where the security guard called Sulu "Tiny". While Takei liked the scene overall, he felt that Sulu being called "Tiny" didn't make much sense, even when writer and producer Harve Bennett explained it was due more to the large size of the security guard. When Takei first saw this movie with an audience of fans, he came to recognize the scene (and Sulu's line "Don't call me 'Tiny'") as a real crowd pleaser, which changed his outlook to a positive reaction.

Grace Lee Whitney: As Janice Rand, Captain Kirk's yeoman in season one of Viaje a las estrellas (1966), and who returned as transporter chief in Viaje a las estrellas (1979). Appears during the Enterprise's docking sequence. She is the red haired officer in the spacedock lounge who shakes her head in disbelief, worried for her former crew, as she sees the ship's extensive damage.