William Shatner as James Tiberius Kirk Leonard Nimoy as Spock DeForest Kelley as Leonard McCoy (Bones) James Doohan as Montgomery Scott (Scotty) Nichelle Nichols as Nyobi Uhura Walter Koenig as Pavel Chekov George Takei as Hikaru Sulu Majel Barret as Christine Chapel Kirstie Alley as Saavik Mark Leonard as Sarek Not known