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"Twin Streaks" is the eighteenth episode of The Flash. It aired on April 13, 1991.

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  • The theme of the episode is the danger of science.
  • It's the first time a live action speedster villain is introduced; a focus that will later be explored much more frequently in the 2014 series The Flash.
  • Lenny Von Dohlen (who plays Jason Brassell in this episode) also plays Harold Smith in Twin Peaks (1990), in which the title of the episode references the series.