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

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