In this clip from this week's Supernatural, "The Monster at the End of this Book," Sam and Dean find the author of the comic book Supernatural and attempt to find out how he knows all the details about their lives.

Supernatural Season 4 Episode 18 Quotes

Chuck Shurley: I'm the prophet Chuck!
Lilith: You've got to be joking.

I'm sitting in a laundry-mat, reading about myself... sitting in a laundry-mat reading about myself. My head hurts.