About Episode

Dean and Sam finally hear from Castiel again, but he cannot go to them because his "batteries" are drained and he has no more power; he's now practically human. Dean and Sam go after Pestilence, and nearly die from a hailstorm of diseases. Castiel shows up (he took a bus) and cuts off the Horseman's finger, using the last of his angelic strength to resist Pestilence's plagues. He takes the ring, but not before Pestilence tells them that "it's too late". Upon rejoining with Bobby, the brothers learn how Bobby "pawned" his soul to Crowley in exchange for Death's location. Crowley explains that Bobby's soul is his insurance, and that he won't give it back until everything has cooled down. It turns out the deal includes a bonus; Bobby can walk again. The group splits up; Sam, along with Castiel and Bobby, head out in order to find and contain the Croatoan virus (disguised and being distributed as a swine flu vaccine). On the way, Castiel hears about Sam's plan concerning Lucifer and surprisingly encourages him. However, he warns Sam that Michael has already found a human vessel: Adam. The battle between Michael and Lucifer will commence if Sam isn't able to resist possession. At the shipping warehouse, the three are able to contain the virus and shoot those who have been infected by it. Meanwhile, Dean goes with Crowley to find Death and get the last ring. They locate Death in Chicago, which according to Bobby is about to be wiped out by the storm of the millennium. As the rain starts, Death and Dean meet in a pizza parlor, littered with the bodies of dead people (customers and staff). Death explains that he is tied to Lucifer through a spell. This is the only reason he didn't try to find Dean, but has instead had to wait for him. He offers to give him his ring, but there is one condition; agree to Sam saying yes to Lucifer so they can lure him into the trap. He'll also spare Chicago. ("I like the pizza.") Dean agrees, receiving the ring and instructions on how to use all four of them to trap Lucifer. Upon returning, he tells Bobby he lied to Death's face, but Bobby says that Death is Death, and asks Dean if he's more afraid to lose, or to lose his brother.