Survival of the Fittest
Supernatural Season 7 Episode 23 (05/18/12)
On this week's episode of Supernatural…
Crowley makes an incredibly long deal with Dick Roman to double cross the brothers in exchange for handing them a fake vial of "fallen" blood.
Dick creates a new additive that kills off skinny people.
Sam and Dean attempt to stop Bobby from going vengeful. Bobby asks the boys to burn the flask and let him go to the other side.
The Impala returns.
Dick duplicates himself in order to fool Sam and Dean, but the brothers use Castiel to spot the real Dick.
Sam rescues Kevin and Dean uses the weapon to kill Dick except it sends him and Castiel to Purgatory. The Leviathan are now masterless and lacking direction.
Crowley takes Kevin for himself.