"Repression" is the 150th episode of the science fiction television series Star Trek: Voyager, the fourth episode of the seventh (and final) season of the series. The storyline revisits the potential for Starfleet and Maquis conflict explored in "Worst Case Scenario" at the end of season three. A series of attacks against former Maquis crew members baffles the Voyager senior staff. This episode explores mind control triggered by a subliminal message and the loyalties of crew members. The friendship between Commander Tuvok and Captain Janeway ultimately overcomes a fanatic's ability to invoke repressed conditioning. A recurring theme is Tuvok's "hunches", which he can neither explain nor ignore. Another feature of this episode is the Vulcan mind meld being used to force or invoke uncharacteristic behaviour. It is unclear how many of the former Maquis crew members on Voyager had been exposed to the fanatic's mind control techniques. This may be a rare instance of a forced mind meld creating aberrant behaviour in the victim.

This is also the only onscreen mention of the name of Chakotay's Maquis ship, the Val Jean.

The episode begins with a Bajoran man talking to a poster of USS Voyager about "a holy time ... of awakening", before sitting before a computer monitor displaying a crew manifest of the Maquis vessel Val Jean. As the Bajoran chants incantations, images of Voyager crew, formerly Maquis, appear on his screen.

On board Voyager, Tom Paris and his new wife B'Elanna Torres enter the Palace Theatre in Chicago holoprogram, a typical art deco (built in 1932, according to Tom) to see a 3D classic film, Revenge of the Creature.

As the film starts, Tom deletes the holographic audience, revealing Tabor (Jad Mager), comatose in the front row. The Doctor finds cranial microfractures and subdermal contusions along his right shoulder. Captain Janeway puts Tuvok in charge of the investigation into the attack. Tuvok's uncharacteristic "hunch" is that someone on Voyager is responsible.

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