In 1994, Morgan was cast as the Flukeman, a mutated flukeworm the size of a human being, in "The Host", a second-season episode of The X-Files, where his brother, Glen, worked as a Writer and Producer. The episode originally aired on September 23, 1994. The role required Morgan to wear a cumbersome rubber suit for twenty hours at a stretch, an experience he described as "terrible, just horrible." Subsequently, he worked with his brother in developing the story for the next episode, "Blood" (aired September 30, 1994), for which he received story credit.