Hmmmmmm.... Leviathans have Bobby taken and S&D scramble to find him. It gets to a point where it looks hopeless - Bobby could not have survived whatever crap the L's have promised/threatened for him. There is a scene where S&D break down emotionally (especially Dean, and it's spectacular in its angst). Then Crowley shows up. Dun dun dun!

Fade to spring hiatus.