"Triangle" is the third episode of the sixth season of the American science fiction television series The X-Files. It premiered on the Fox network on November 22, 1998. Written and directed by series creator Chris Carter, "Triangle" is a "Monster-of-the-Week" episode, a stand-alone plot which is unconnected to the overarching mythology of The X-Files. "Triangle" earned a Nielsen household rating of 10.8, being watched by 18.20 million viewers in its initial broadcast. The episode generally received positive reviews with many critics commenting on the episode's directing style.