About Supernatural Season 13, Episode 20 : Unfinished Business

Gabriel is back and drags Sam and Dean into his plot for revenge on the demigods who sold him to Asmodeus. Meanwhile, Jack's inflating confidence leads to reckless decisions that could put others in harm's way. Guest Stars: Fletcher Donovan, Sandy Robson, Tarun Keram, Michael Adamthwaite, Alexander Calvert, Ruth Connell, Samantha Smith, Richard Speight Jr.,