Kill Switch re-visits the idea of artificial intelligence(AI) gone rogue, a concept first explored in season one's "Ghost in the Machine". Computer stuff always fascinates me, so it's easy for me to like episodes with this subject matter. It's interesting, that right after the teaser, Mulder and Scully come upon Donald Gelman's laptop which still has command on the screen to hit "enter" to initiate program. If only Mulder had known, a big mess could have been avoided, if he had pressed that button. It's funny to see Scully's complete disbelief in AI. Her skepticism is to the extreme in this episode. The Lone Gunmen are featured in Kill Switch, which is always a bonus. Mulder's "virtual" experience is quite entertaining, especially when we get to see "Kung-Fu Scully". She kicks some nurse butt. A little nitpick with a continuity error: Scully and Esther are walking through the woods and you can see snow falling behind them. Two seconds later, they come up to the camper and there is no snow anywhere and not even falling. It's not a negative thing, just a cool nitpick. I actually find some of the AI stuff harder to believe than the paranormal happenings that the agents normally investigate. Kill Switch is a cool, fun, and interesting episode that shouldn't be missed.