Star Trek: The Original Series, season 2, episode 6
The Doomsday Machine
Summary
After losing his entire crew to a planet-eating alien machine from another galaxy, Commodore Matt Decker pulls rank on Kirk in order to play a game of cat-and-mouse with the mechanical adversary. His efforts to destroy the menace place the Enterprise in grave danger. This episode serves as the backstory for the Star Trek 25th Anniversary Game Boy game.
Summary from Wikipedia, CC BY-SA 4.0.
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