This week on Supernatural, Sam and Dean tried to stop the raising of Samhain, a demon associated with the origins of Halloween. Yeah, Samhain's return is significant. Raising him breaks one of the 66 seals which means Lucifer is that much closer to walking the Earth. Meanwhile, Castiel is back and we're introduced to a new angel. Uriel's not as "touchy-feely" as Cas and is definitely opinionated when it comes to the Winchester brothers.
read full recap from: TvGuide