Return to Tomorrow

A landing party beams down to the long-dead planet, Arret. They find a deep cave containing three living, disembodied, highly intelligent beings. They are Sargon, his wife Thalassa and Henoch, Sargon's former enemy. The trio have been reduced to glowing lights inside large, opaque globes that rest on stands. The rest of their race is long-dead and Sargon feels that the differences between he and Henoch no longer matter. He wants to control the landing party's bodies in order to build androids to house he and his two companion's essences. After some debate, Sargon convinces Kirk to 'loan' him his body, while Henoch uses Spock's and Thalassa borrows Dr. Ann Mulhall. The three Enterprise crewmember's intellects will rest in the globes in the starship's sickbay.

After centuries of living without physical sensations, the three begin to enjoy life within a living, feeling body. Deciding to keep Spock's body permanently, Henoch poisons Kirk's body, hoping to kill Sargon and prevent him from interfering with his plans. He then tries to convince Thalassa to keep the body housing her mind and stay with him. Thalassa, however, loves Sargon and refuses. Sargon escapes Kirk's body and hides in the hull of the Enterprise. McCoy puts Kirk's body on life support until the captain's essence can be returned to it. By hiding Spock's intelligence in Christine Chapel's body and luring Henoch out of the Vulcan's body, Sargon and Kirk are able to destroy Henoch. Deciding not to wait for the androids, that would have housed thier essence, to be finished, Sargon and Thalassa leave the U.S.S. Enterprise to live a disembodied existence on the planet.

Cast:

William Shatner as James Tiberius Kirk™

Leonard Nimoy as Spock™

DeForest Kelley as Leonard H. McCoy™

James Doohan as Montgomery Scott™

Nichelle Nichols as Uhura™

George Takei as Hikaru Sulu™

Guest Cast:

Diana Muldaur as Dr. Ann Mulhall

James Doohan as Sargon's Voice