[s6e19] Mommy Dearest Link

In the Supernatural episode " Mommy Dearest ," Sam, Dean, Bobby, and Castiel travel to Oregon to confront Eve, the Mother of All Monsters, who is creating powerful new hybrid creatures. Eve taunts the brothers by taking the form of their mother and revealing that Crowley is still alive, leading to a showdown where Dean kills her with phoenix ash. The episode concludes with the revelation that Castiel and Crowley have been working together all along. "Supernatural" Mommy Dearest (TV Episode 2011) - IMDb