The Enterprise is taking it's first Captain, Commodore Robert April, and his wife, Sarah,
to Babel, when it sees a ship flying into a super nova. The Enterprise tries to help by locking a
tractor beam onto it, but is pulled into a negative universe where time flows backwards.
The pilot of the alien ship agrees to help them get back, but the crew is rapidly growing
younger and will soon be unable to operate the ship.
This was the last episode of Star Trek The Animated Series. It was another five years before Star Trek: The Motion Picture was released.