Episode Name: Reading is Fundamental
Air date: 5/4/2012
Summary: Meg calls Dean and Sam and tells them Castiel is awake and talking. Meanwhile, a teenager named Kevin (guest star Osric Chau) gets hit by a bolt of lightening and is turned into a reluctant prophet. Sam and Dean believe Kevin holds the key to defeating the Leviathans but must fight off two Archangels who want him for their own purposes.
Watch or download Supernatural – Season 7 Episode 21 – Reading is Fundamental at below links.