 Despite his lack of power, he is able to defeat the Horseman Pestilence using what appears to be what little is left of his angelic strength, and assists Bobby and Sam in preventing nationwide distribution of the Croatoan virus.In the fifth-season finale, "Swan Song", Castiel loses faith after Sam fails to overpower Lucifer when he possesses him and suggests they get drunk and wait for the end to come.When Dean refuses to give up, Castiel and Bobby follow him and Castiel uses a Molotov cocktail of Holy Fire to temporarily banish Michael to buy Dean time to try to reach Sam.