While exploring a burnt-out supernova, the U.S.S. Enterprise responds to an old-style distress signal containing the word "Terratin," and follow it to its source: an uninhabited planet about to shatter from internal stress. However, a mysterious beam strikes the ship and the crew begins to shrink... and shrink... On the planet, Kirk finds a miniature city called Terratin and soon discovers that it is a lost Earth colony that has mutated because of the supernova's radiation.
Guest Cast

Nichelle Nichols
voices Lt. Nyota Uhura
George Takei
voices Lt. Hikaru Sulu
James Doohan
voices Lt. ArexCast Appearances

Leonard Nimoy
voices SpockEpisode Discussion
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