Diner. Aftermath. MORE TALKING. So, let's wrap this up: Long story short, Mother Mary proposes the boys work for her to rid the world of Crowley once and for all, and the boys tell Mother Mary to go blow. Mother Mary does not take kindly to their suggestion at all, and has a couple of her obedient Starship underlings muscle Bobby and My Sweet Baboo in from the street to make threats against their lives. Dean nevertheless adamantly insists he'll not be working for the likes of her anytime soon, so Mother Mary next proposes she turn them, which means they'll all be working for her, anyway. "Beat me with a wire hanger," Dean snorts, "the answer's still no." Mother Mary immediately latches onto his neck to start sucking -- "'Start'?! Hee!" -- and that's a very bad move on Mother Mary's part, indeed, for at some point in the last fifteen interminable minutes or so, Dean had tipped the contents of the last phoenix-ash cartridge into a shot of whiskey and gulped the foul mixture down, so now his blood is loaded with the one substance on the planet that can kill her. D'OH!
Mother Mary gets barely a mouthful of Dean's blood before reeling back away from him, gagging, and as Dean outlines the details of his cunning plan, a brilliant white light erupts somewhere deep within Mother Mary's rib cage to illuminate her skeleton from within. And in a nifty little effects touch I didn't notice until I happened to pause on it, Mother Mary's eyebrows shoot up into fiendish arches as she shoots Death Glares in Dean's general direction. I think her mouth goes all unnaturally wide at one point, as well, but I'm not going to rewind to make sure. It's subtle enough to make Samantha Smith look decidedly off during this sequence, but not so blatant that you're no longer able to recognize her as human, which happens a lot on this show. And just as streaks of bitterly black foulness erupt on her scalp to race down across her face, Mother Mary doubles over and morphs back into Eve, who chokes and gasps for air while blood begins to flow freely from every single hole in her head, and thick ropes of greenish slime start cascading down from the top of her head, and for one brief moment, Eve looks like the terrified adolescent she was before she was flung into The Pit, and then she collapses to the floor, dead.