From Zap2it.com:
If it seems like the strained relationship between the Winchester brothers on "Supernatural" is improving, don't get too comfortable. Despite the old-school "beers on the hood of the Impala" scene in the most recent episode, all is not well between Sam (Jared Padalecki) and Dean (Jensen Ackles).
Warning! If you don't want to read MAJOR spoilers then DON'T click here