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"The Chase" is the 146th episode of the syndicated American science fiction television series Star Trek: The Next Generation, the 20th episode of the sixth season. It is directed by series cast member Jonathan Frakes (Commander William Riker). Set in the 24th century, the series follows the adventures of the Starfleet crew of the Federation starship Enterprise-D. In this episode, four competing expeditions—Federation, Klingon, Cardassian, and Romulan—attempt to solve an ancient genetic puzzle.