A surprise visit from Spock's father provides a startling revelation: McCoy is harboring Spock's living essence.
Cast
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
Danny Rogers
Merchantman First Officer (uncredited)
Crew
Leonard Nimoy
Director
Harve Bennett
Writer, Producer
Robert F. Shugrue
Editor
Charles Correll
Director of Photography
John Hockridge
First Assistant Director
Gary Nardino
Executive Producer
Ralph Winter
Associate Producer
Elza Bergeron
Casting
Mary Ann Barton
Casting
Stuart Jensen
Casting
Robert Fletcher
Costume Design
Silvia Abascal
Hairstylist
Rick Stratton
Makeup Artist
Jim Kail
Makeup Artist
Wes Dawn
Makeup Artist
James Lee McCoy
Makeup Artist
Cecelia Hall
Supervising Sound Editor
Ray West
Sound Re-Recording Mixer
Robert W. Glass Jr.
Sound Re-Recording Mixer
David J. Hudson
Sound Re-Recording Mixer
Alan Howarth
Sound Effects
Bob Dawson
Special Effects
Steve LaPorte
Special Effects Makeup Artist
Tom Woodruff Jr.
Special Effects Makeup Artist
Ken Ralston
Visual Effects Supervisor
James Horner
Original Music Composer
Tom Pedigo
Set Decoration
Steve Blalock
Stunts
Ernest Robinson
Stunts
David Burton
Stunts
Kenny Endoso
Stunts
Chuck Hicks
Stunts
Jean Coulter
Stunts
Alan Oliney
Stunts
Danny Rogers
Stunts
Phil Chong
Stunts
Jeff Jensen
Stunts
James M. Halty
Stunts
Tom Morga
Stunts
Chuck Picerni Jr.
Stunts
Don C. McGovern
Stunts
Frank James Sparks
Stunts
Eddy Donno
Stunts
R.A. Rondell
Stunt Coordinator
Ron Stein
Stunt Coordinator
John C. Meier
Stunt Double
Al Jones
Stunt Double
Gene Roddenberry
Original Series Creator
John E. Chilberg II
Art Direction
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