[2] Morgan subsequently wrote a number of unproduced screenplays and appeared in two small guest roles on The Commish and 21 Jump Street, where his brother Glen was a writer.

[3] Joel Silver hired Morgan to write the second intended Tales From The Crypt film after Demon Knight, called Dead Easy (aka Fat Tuesday) a New Orleans zombie romp.

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.

[4] At the suggestion of producer Howard Gordon shortly thereafter,[4] Morgan became a full-time staff writer for The X-Files, where he wrote his first episode, "Humbug" (originally aired on March 31, 1995).

"Clyde Bruckman" remains a favorite of fans and critics alike, and was acclaimed for retaining the humorous spirit of "Humbug" while extending its story into darker, more poignant territory.

Morgan wrote two additional episodes of The X-Files in the 1990s: the absurdist cockroach invasion story "War of the Coprophages" (originally aired on January 5, 1996) and "Jose Chung's From Outer Space" (April 12, 1996).

[6] In addition to his work as a writer, Morgan appeared in The X-Files episode "Small Potatoes" (April 20, 1997), playing Eddie Van Blundht, a self-described "loser" with the ability to shape-shift.