When the planet Sarpeidon is about to be destroyed, by its star Beta Niobe becoming a supernova, Kirk (William Shatner), Spock (Leonard Nimoy) and McCoy (DeForest Kelley) beam down and find it evacuated except for its librarian, Mr. Atoz (Ian Wolfe), tending to his replicas. They are a collection of unusual discs, which play the planet's history and (to their surprise) allow their users to travel into the past through the atavachron, a time machine, into the periods each was studying on disc. The crew travels unprepared, McCoy and Spock find themselves locked in a frozen ice age 5,000 years ago, where Spock reverts to the barbaric age of the Vulcans. He becomes very easily agitated, and is intensely attracted to the political prisoner Zarabeth (Mariette Hartley), who enjoys getting company but tells them return is impossible. Kirk arrives in a Cromwellian period, where he's arrested and suspected of witchcraft. He soon realizes the magistrate must be a time traveler like him, and ...
Did You Know?
Part of the set depicting the surface of the ice age planet where Spock & McCoy are transported was recycled from the MGM film Ice Station Zebra
(1968), made the previous year. See more
When Spock tries to use his phaser to warm a boulder at the base of the ice cliff, it doesn't work - presumably because phasers didn't exist in that time period. But when he lays McCoy out in Zarabeth's cave and examines him, the doctor's medical tricorder seems to work just fine. See more
Are you trying to kill me, Spock? Is that what you really want? Think; what are you feeling? Rage, jealousy? Have you ever had those feelings before?
This is impossible... Impossible. I am a Vulcan.
The Vulcan you knew won't exist for another five thousand years. Think, man. What's happening on your planet right now, this very moment?
My ancestors are barbarians. Warlike barbarians.
Who nearly killed themselves off with their own passions. Spock, you're reverting into your own ancestors five ...
Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more