Star Trek III: The Search for Spock

A surprise visit from Spock's father provides a startling revelation: McCoy is harboring Spock's living essence, and the crew of the USS Enterprise must steal the decommissioned ship to return Spock's body to his homeworld, where his spirit needs to be reunited with his physical form. As they contend with hostile Klingons led by Kruge, who seek to exploit the terraforming device Genesis, Kirk grapples with a personal loss and discovers an unexpected family bond between himself and his beloved friend, Spock.