William Shatner (Admiral James T. Kirk), Leonard Nimoy (Captain Spock), DeForest Kelley (Dr. Leonard McCoy), Catherine Hicks (Dr. Gillian Taylor), James Doohan (Montgomery Scott), George Takei (Cmdr. Hikaru Sulu), Walter Koenig (Cmdr. Pavel Chekov) more..., Nichelle Nichols (Cmdr. Uhura), Mark Lenard (Ambassador Sarek), Jane Wyatt (Amanda), Majel Barrett (Commander Chapel), Robert Ellenstein (Federation Council President), John Schuck (Klingon Ambassador), Brock Peters (Admiral Cartwright), Robin Curtis (Lt. Saavik), 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), Nick Ramus (Saratoga Helmsman), Philip Weyland (Tourist (uncredited)), Kimberly L. Ryusaki (Tourist (uncredited)), Scott Devenney (Bob Briggs), Monique DeSart (Madelaine (uncredited))

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..., 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), Armen Ksajikian (Musician), Eddie Hice (Stunts), Leonard Nimoy (Story), Harve Bennett (Story), Nilo Rodis-Jamero (Assistant Art Director), Ralph Winter (Executive Producer), Jeff Dawn (Makeup Artist), Rick Stratton (Makeup Artist), R. A. Rondell (Stunt Coordinator), Alan Howarth (Sound Effects), Brooke Breton (Associate Producer), Frank Capra III (Second Assistant Director), Pat Kehoe (First Assistant Director), David J. Hudson (Sound Re-Recording Mixer), Mel Metcalfe (Sound Re-Recording Mixer), Terry Porter (Sound Re-Recording Mixer), Carol A. O'Connell (Hairstylist), Cliff Fleming (Stunts), Michael Lantieri (Special Effects), Spike Silver (Stunts) and others.