Crowley tells Dean that the Mark of Cain needs to be fed.
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2. Reichenbach - Crowley tells Dean that the Mark of Cain needs to be fed.
Dean runs amok as a demon in the season ten premiere.
Crowley enlists Castiel to help stop Dean.
A recent string of attacks points to the werewolf Kate.
Sam and Dean investigate a haunting at a theatre.
Dean gets a surprising message from Bobby's cell phone.
Sam & Dean encounter the witch Rowena.
Sheriff Jody Mills calls Sam & Dean for help.
Castiel reunites with the daughter of his vessel.
Sam, Dean and Castiel search for a cure for the Mark of Cain.
Charlie Bradbury returns from Oz...with a mission.
Dean is turned into his 14-year-old self by a witch.
A ghost is killing people through various electronic devices.
Sam, Dean and Castiel deal with the return of Cain.
Cole teams up with the Winchesters.
Rowena makes plans to reclaim her magic.
Dean and Rowena face off against each other.
Charlie contacts Sam and Dean after she finds the Book of the Damned.
Sam tries to save Dean with a Men of Letters artifact.
Castiel helps Claire Novak reunite with her mother.
The Winchesters meet the Styne family.
When it comes to the Stynes, Dean is on a rampage.
Dean makes a shocking decision in the season finale.