Firewalker.

About Firewalker

"Firewalker" is the ninth episode of the second season of the American science fiction television series The X-Files. It premiered on the Fox network on November 18, 1994. It was written by Howard Gordon, directed by David Nutter, and featured guest appearances by Bradley Whitford, Leland Orser and Shawnee Smith. The episode is a "Monster-of-the-Week" story, unconnected to the series' wider mythology.