The CW released a few clips of the episode
7.21 - "Reading is Fundamental".

Sam and Dean believe Kevin, the new reluctant
prophet holds the key to defeating the Leviathans.

Airs: Friday May 4th, 2012 at 9/8c

The CW has released 13 episode stills of
7.21 - "Reading is Fundamental".

Meg calls Dean and Sam and tells them Castiel is awake and talking.
Written and Directed by: Ben Edlund.
Airs: Friday, May 4th, 2012 at 9/8c.

The CW has released an official description of the Season 7 Finale episode, "Survival of the Fittest"

SAM & DEAN MUST TAKE DOWN DICK ROMAN
Written by: Sera Gamble
Directed by: Robert Singer
Airs: Friday, May 18th, 2012.

The CW released a few clips of the episode
The Girl With The Dungeons & Dragons Tattoo.

Sam and Dean team up with a hacker and go after Dick Roman who has the hard drive with sensitive info about the Winchesters.
Airs: Friday April 27th, 2012 at 9/8c

The CW has released 13 episode stills of
The Girl With The Dungeons & Dragons Tattoo.
Sam & Dean go after Dick Roman, who has sensitive info about them.
Written by: Robbie Thompson,
Directed by: John MacCarthy
Airs: Friday, April 27th, 2012 at 9/8c.

The CW has released an official description of
7.22 – "There Will Be Blood"

SAM AND DEAN SEEK OUT AN ALPHA MONSTER
Written by: Andrew Dabb & Daniel Loflin
Directed by: Guy Bee
Airs: Friday, May 11th, 2012.