The CW has released an official description of
7.21 – "Reading Is Fundamental"

CASTIEL AWAKENS FROM HIS COMATOSE STATE
Written and Directed by: Ben Edlund
Airs: Friday, May 4th, 2012.

Things are changing behind the scenes of Supernatural once again.
Deadline reports that Sera Gamble, who'd been serving as co-showrunner on the series for
the past two years, is stepping down and will be replaced by Jeremy Carver.

The CW has released an official description of
7.20 – "The Girl With The Dungeons and Dragons Tattoo"

Written by: Robbie Thompson
Directed by: John MacCarthy
Airs: Friday, April 20th, 2012.

The CW has released an official description of
7.19 – "Of Grave Importance"

AN OLD FRIEND RECONNECTS WITH SAM & DEAN
Written by: Brad Buckner & Eugenie Ross-Leming
Directed by: Tim Andrew
Airs: Friday, April 20th, 2012.

The CW released a few clips of the episode
7.18 - "Party On, Garth".
Sam, Dean, and Garth are on a hunt,
battling a Japanese creature that you can only see when you're drunk.

Airs: Friday March 30th, 2012 at 9/8c

The CW has released 10 episode stills of
7.18 - "Party On, Garth"
Dean gets a call from Garth asking for the brothers’ help on a case.
Written by: Adam Glass
Directed by: Phil Sgriccia
Airs: Friday, March 30th, 2012 at 9/8c.