The X-Files had one episode that was especially terrifying, probably because horror master Stephen King wrote it.

Edwin Hodge as Special Agent Ray Cannon and Steven Williams as Ray Cannon Sr in "FBI: Most Wanted" Mark Schafer/CBS/Laura Burke EXCLUSIVE: Veteran actor Steven Williams (X-Files, 21 Jump Street ...

The X-Files follows FBI Agents Fox Mulder and Dana Scully's journey as they seek truth beyond logical explanation. Their search for strangeness and supernatural occurrences leads them to discover ...

That impact can still be felt today. “The X-Files” largely revolved around FBI agents Mulder and Scully, assigned to the bureau’s … you guessed it, X-Files, the name for unsolved cases ...