105 minutos
A surprise visit from Spock's father provides a startling revelation: McCoy is harboring Spock's living essence.
William Shatner
Admiral James T. Kirk
DeForest Kelley
Dr. Leonard 'Bones' McCoy
James Doohan
Captain Montgomery 'Scotty' Scott
George Takei
Cmdr. Hikaru Sulu
Walter Koenig
Cmdr. Pavel Chekov
Nichelle Nichols
Cmdr. Uhura
Christopher Lloyd
Cmdr. Kruge
Robin Curtis
Lt. Saavik
Mark Lenard
Ambassador Sarek
Merritt Butrick
Dr. David Marcus
Judith Anderson
Vulcan High Priestess
James B. Sikking
Captain Styles
Phillip R. Allen
Capt. Esteban
Robert Hooks
Admiral Morrow
John Larroquette
Maltz
Carl Steven
Spock...Age 9
Vadia Potenza
Spock...Age 13
Stephen Manley
Spock...Age 17
Joe W. Davis
Spock at age 25
Leonard Nimoy
Captain Spock / Elevator Voice
Miguel Ferrer
First Officer
Branscombe Richmond
Klingon Gunner #2
Frank Welker
Spock's Screams
Scott McGinnis
Starfleet Cadet "Mr. Adventure"
Phil Morris
Trainee Foster
Jeanne Mori
Helm Officer
Grace Lee Whitney
Commander Janice Rand (Woman in Cafeteria)
Nanci Rogers
Bar Waitress (uncredited)
Paul Sorensen
Captain
