The CW released a few clips of the episode
7.15 - "Repo Man".

Sam continues to see hallucinations of Lucifer , while on the hunt for a demon

Airs: Friday February 17th, 2012 at 9/8c

The CW has released 5 episode stills of
7.15 - "Repo Man"
Sam & Dean must stop a demon that has returned for a second helping
Written by: Ben Edlund
Directed by: Thomas J. Wright
Airs: Friday, February 17th, 2012 at 9/8c.

The CW released a few clips of the episode
7.14 - "Plucky Pennywhistle’s Magical Menagerie".
Winchester brothers investigate a local pizza chain that hosts children’s birthday parties in Kansas.

Airs: Friday February 10th, 2012 at 9/8c

In the past seven seasons of Supernatural, Sam Winchester has had to face some freaky creatures, including all manner of demons, spirits and the undead. Now add to that list his ultimate nightmare: clowns.
Check out these exclusive first-look photos of Sam taking on two bozos

The CW released a few clips of the episode
7.13 - "The Slice Girls".
Sam and Dean investigate a case where the victims’ hands and feet have been severed and each have been branded with a strange symbol.

Airs: Friday February 3rd, 2012 at 9/8c

The CW has released an official description of
7.15 – "Repo Man"
Written by: Ben Edlund
Directed by: Thomas J. Wright

Airs: Friday, February 17th, 2012.