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| William Shatner | Capt. / Adm. James T. Kirk | |
| Catherine Hicks | Dr. Gillian Taylor | |
| DeForest Kelley | Dr. Leonard McCoy | |
| James Doohan | Capt. Montgomery Scott | |
| Walter Koenig | Cmdr. Pavel Chekov | |
| Mark Lenard | Ambassador Sarek | |
| Nichelle Nichols | Cmdr. Nyota Uhura | |
| Leonard Nimoy | Capt. Spock | |
| George Takei | Cmdr. Hikaru Sulu | |
| Jane Wyatt | Amanda | |
| Robin Curtis | Lieutenant Saavik | |
| Brock Peters | Admiral Cartwright | 
| Director | 
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| Producer | Ralph Winter Harve Bennett | ||
| Writer | Nicholas Meyer Leonard Nimoy | ||
| Cinematography | Donald Peterman | ||
| Musician | Leonard Rosenman | 
|  | To save Earth from an alien probe, Kirk and his crew go back in time to retrieve the only beings who can communicate with it, humpback whales. | 
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