Supernatural 7x21 Official Description
“Reading is Fundamental” (May 4, 2012)
CASTIEL AWAKENS FROM HIS COMATOSE STATE — Meg (guest star Rachel Miner) calls Dean (Jensen Ackles) and Sam (Jared Padalecki) and tells them Castiel (guest star Misha Collins) 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. The episode was written and directed by Ben Edlund (#721).