HAH! Oh, Supernatural, you little minx. First you give us the total and complete fan valentine that was the fantabulous "Monster at the End of this Book" and now this. Sam and Dean have a long lost half-brother ... or do they?
Phil Sgriccia directed the episode written by Andrew Dabb & Daniel Loflin.
Supernatural airs Thursday at 9:00 (EDT) on the CW.