On screen
Cast
18 credited performers
William Shatner
James T. Kirk (voice)
Leonard Nimoy
Spock (voice)
DeForest Kelley
Leonard McCoy (voice)
George Takei
Hikaru Sulu (voice)
Nichelle Nichols
Uhura (voice)
James Doohan
Montgomery Scott (voice)
Majel Barrett
Christine Chapel / Starfleet Computer (voice)
Lou Scheimer
Romulan Crewman (voice) (uncredited)
Artwork unavailable
David Gerrold
EM / 3 / Green (voice) (uncredited)
Artwork unavailable
Norm Prescott
Orion lieutenant / Orion ensign (voice) (uncredited)
Stanley Adams
Cyrano Jones (voice) (uncredited)
Roger C. Carmel
Harcourt Fenton Mudd (voice) (uncredited)
Ted Knight
Vendorian / Carter Winston (voice) (uncredited)
Ed Bishop
Asmodeus (voice) (uncredited)
Mark Lenard
Sarek (voice) (uncredited)
Artwork unavailable
Billy Simpson
Young Spock (voice) (uncredited)
Artwork unavailable
Keith Sutherland
Young Sepek (voice) (uncredited)
Artwork unavailable
Jane Webb
Lara / Vedala Female (voice) (uncredited)