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Trapped in a dead star, the Enterprise crew discovers that there is an ancient derelict pod ship trapped with them, as well.
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After finding himself erased from recent history, Spock must travel back in time to save himself as a youth.
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The crew of the Enterprise tries to stop a living planet-consuming cloud before it attacks an inhabited world.
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Investigating a sector where starships disappear, the Enterprise finds a race of beautiful women living on Taurus II.
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Cyrano Jones again infiltrates the Enterprise with Tribbles that now grow to monstrous size.
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A man who claims to be a famous humanitarian is found alive near the Neutral Zone after being missing for five years.
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Lt. Sulu and Mr. Spock discover strange happenings on a planet of intelligent plant-like creatures.
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The computers of the Enterprise are erased and the crew is tricked into landing on a hostile planet.
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The crew revisits the "amusement park" from the classic episode "Shore Leave," hoping for some rest and relaxation.
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The Enterprise receives orders to arrest Federation outlaw Harry Mudd, who is accused of selling fake love crystals.
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While observing a burnt-out supernova, the Enterprise picks up a strange message transmitted in a 200-year-old code.
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The Enterprise and a Klingon ship are trapped in space-time warp where only their cooperation will allow them to escape.
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Captain Kirk and Mr. Spock are transformed into water breathers by a planet's undersea inhabitants.
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The crew discovers an ancient multi-use weapon and are captured by the Kzinti, who are equally interested in it.
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While investigating the disappearance of a scientific team, the Enterprise discovers a planet with an alien zoo.
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Kirk and Spock lead a team to recover a stolen artifact that could set off a galactic holy war.
