Dick Roman summons Crowley and makes a deal with the demon, asking him to give blood from a common demon to the Winchester brothers instead of his own. Meanwhile Dean and Sam get the bone of a nun and they just need Crowleys blood to prepare the weapon to vanquish Dick Roman. Dean and Sam also burn Bobby's flask so his ghost can rest in peace. EWen Crowley arrives, he tells his agreement with Dick to Dean and Sam and gives sample of his blood. Is Crowley betraying Dick Roman or the Winchester brothers?