removed spoilers - please do not post anything before it's aired, thank you
As Sam embraces Lilith on the bed he grabs Ruby's knife in a last ditch attempt to kill her; however she overpowers him and seizes the knife. Dean and Chuck abruptly enter the room, with Dean demanding that Lilith leave, before the Archangel who protects Chuck comes and kills her. As the room is slowly being engulfed by light, Lilith heeds Dean's words and departs from the body, leaving it motionless on the floor.
==Lilith in Myth and Religion==