Supernatural Season 3 Episode 9
"Malleus Malifecarum"
Sam and Dean travel to Sturbridge, Massachusetts, and discover a coven of witches that has killed two people. These witches uses some ritual in killing. Ruby warns the brothers to stay away as the demon controlling these witches is very powerful and will surely kill them. Ignoring her plea, Sam and Dean go in after the coven and confront the head witch, who reveals Ruby’s past. As they go on, Dean now becomes the victim and then on Sam rushes to the witches to save Dean. They were able to stop the Demon using the knife from Ruby. At the last part of it, Ruby and Dean had a conversation, telling Dean that Ruby can’t save his life from the crossroad deal he had.
