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Season 5 sees Sam and Dean facing off against a new enemy: the Leviathans. The season also explores the brothers' relationships with other characters, including Castiel and Bobby (Jim Beaver).

The second season builds on the success of the first, introducing new characters and deepening the mythology of the show. Sam and Dean face off against a variety of foes, including vampires, werewolves, and demons. The season also explores the brothers' backstory, including their mother's death and their father's disappearance. Supernatural all seasons 1- 2- 3- 4- 5- 6- 7- 8- 9

The fourth season continues the story of Sam and Dean as they deal with the aftermath of Lucifer's release. The season introduces the concept of Apocalypse, as the brothers work to prevent the end of the world. Season 5 sees Sam and Dean facing off