Not only does Sam feel nothing on Supernatural, but Dean beat the tar out of him at the end of the last episode. This week we find out what's wrong with Sam, though it's a bit anticlimactic since the preview already gave away the answer.

Theory: What Happened to Sam>>

Still, the CW has a new clip from the episode where Cas does his best Dr. House impression while diagnosing Sam's condition, which includes a broken nose and the worst case of insomnia ever. Of course we already know the eventual diagnosis.



And if you've been hiding under a rock, here's the preview that explains everything you need to know about Sam.



Supernatural airs Friday at 9pm on the CW.


(Image and video courtesy of the CW)