SOOO EXCITED! Apparently this person saw it ahead of time and wrote some stuff about it. Anyways they said the episode is very much like Mystery Spot in that it starts out funny and ends very dark. And also that something in the episode Mystery Spot is revealed in this epiosde.
Someone said Dean probaly finds out that Sam had to live all those months without his brother.
HOMG I LOVE Mystery Spot, One of my top five episodes ever, so WEEEEEE!!!!