The best episode written by William Gibson is "Kill Switch", rated 7.378/10 from 41 user votes. It was "directed by Rob Bowman". "Kill Switch" aired on 2/15/1998 and is rated 1.4 point(s) higher than their second highest rated, "First Person Shooter".
A super-intelligent virus program is let loose on the internet and begins to grow and expand by itself, eventually killing its creator when he tries to eradicate it.
Director: Rob Bowman
Writer: William Gibson
The Lone Gunmen call Mulder and Scully to a virtual reality development lab where they learn that one of the program testers was killed inside the computer generated game environment by the digital image of a woman. Needing to get his yah-yah's, Mulder enters the game to fight the woman, but Scully must step in to save him.
Director: Chris Carter
Writer: William Gibson