Sam and Dean investigate the death of a man a couple of days before Halloween. Another death makes them go suspicious. Castiel appears with Uriel and reveal that a witch is trying to resurrect Samhaine, another demon, and this is another seal.
This Supernatural episode was pure awesome. It was great with all the "Seals being broken" and "freeing Lucifer from Hell" stuff. The episode was full of action, suspense and drama. It was great, this was the first appearance of another angel, Uriel, and Castiel is back. The episode was amazing, is rlly great. Supernatural Season 4, Angels vs Demons, is rlly getting cool.