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
