William Shatner (Admiral James T. Kirk), Leonard Nimoy (Captain Spock), DeForest Kelley (Dr. Leonard McCoy), James Doohan (Montgomery Scott), Walter Koenig (Cmdr. Pavel Chekov), Nichelle Nichols (Cmdr. Uhura), George Takei (Cmdr. Hikaru Sulu) more..., Catherine Hicks (Dr. Gillian Taylor), Mark Lenard (Ambassador Sarek), Jane Wyatt (Amanda), Robin Curtis (Lt. Saavik), Robert Ellenstein (Federation Council President), Brock Peters (Admiral Cartwright), John Schuck (Klingon Ambassador), Michael Snyder (Starfleet Communications Officer), Kirk R. Thatcher (Punk on Bus), Michael Berryman (Starfleet Display Officer), Madge Sinclair (Saratoga Captain (uncredited)), Grace Lee Whitney (Commander Rand), Jane Wiedlin (Alien Communications Officer), Vijay Amritraj (Starship Captain), Majel Barrett (Commander Chapel), Nick Ramus (Saratoga Helmsman)

Harve Bennett (Producer), Steve Meerson (Screenplay), Peter Krikes (Screenplay), Harve Bennett (Screenplay), Nicholas Meyer (Screenplay), Donald Peterman (Director of Photography), Joe Aubel (Art Direction) more..., Nilo Rodis-Jamero (Art Direction), Peter Landsdown Smith (Art Direction), John M. Dwyer (Set Decoration), Robert Fletcher (Costume Design), Leonard Rosenman (Original Music Composer), Amanda Mackey (Casting), Jack T. Collis (Production Design), Peter Landsdown Smith (Production Design), Peter E. Berger (Editor), Kirk R. Thatcher (Associate Producer), Douglas Freeman (Construction Coordinator), Ken Ralston (Visual Effects Supervisor), Mel Efros (Unit Production Manager), Mark A. Mangini (Sound Effects),