The three principal Trekkers find themselves on a planet where everyone is being evacuated to the past to escape an impending supernova.
Michael Main
Spock! You’re reverting into your ancestors, five thousand years before you were born!

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  1. “All Our Yesterdays” by Jean Lisette Aroeste, directed by Marvin J. Chomsky (NBC-TV, USA, 14 March 1969).
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Jean Lisette Aroeste
    Arthur H. Singer (other contribution)
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . directed by Marvin J. Chomsky
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . created by Gene Roddenberry