Supernatural S6 Ep 19 - F2F Transformations

Season 6 Episode 19 Mommy Dearest
When Dean and Sam don't believe her, Eve takes on the form of Mary Winchester to emphasize her point about a mother's love. Eve says that she'll turn them instead and Dean still refuses, saying that even if she beats him with a wire hanger, he still won't cooperate. She grabs him and says not to test her, and Dean tells her to bite him. She does, but then falls back, gagging, as Dean explains that he drank the phoenix ash down with whiskey. They watch as Eve burns up from the inside and collapses to the ground.