Episode 20— Return to Tomorrow
Aired February 9, 1968 · 50 min
Synopsis
In this episode, Captain Kirk and First Officer Spock are possessed by ancient alien entities, causing their behavior to become erratic and unpredictable. The situation escalates into a crisis aboard the USS Enterprise, as the crew struggles to manage the altered conduct of their commanding officers. With the stability of the ship at risk, the crew works urgently to find a solution and regain control before the situation worsens.
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