About Supernatural Season 15, Episode 17 : Unity

Dean hits the road with Jack who needs to complete a final ritual in the quest to beat Chuck. A difference of opinion leaves Sam and Castiel behind looking for answers to questions of their own. Guest Stars: Robert Wisdom, Emily Swallow, Alessandro Juliani, Carmen Moore, Corina Bizim, Christopher Webb, Eileen Barnett, Duncan Bourke, Jeff Gladstone,