Sam, Dean and Castiel are left to defend the world after all the souls in hell are released and free to kill again.
Sam, Dean and Castiel call on Rowena to help keep the evil souls at bay and get an unexpected assist from Ketch.
Sam, Dean and Rowena work tirelessly to keep all of hell from breaking loose; Castiel cannot forgive an arrogant betrayal.
Sam and Dean investigate the mysterious death of a girl and the disappearance of another.
Sam and Dean's routine case turns out to be anything but.
Sam and Dean receive a visit from an old friend; Castiel investigates a local teenager's disappearance.
Dean goes off on his own to take on a case; Castiel has an idea of how he can help Sam track down God.
Sam, Dean and Castiel's continued search for a way to defeat Chuck leads them to unexpected places and toward unlikely allies.
Sam and Eileen are faced with the brutal truth; Dean and Cas work together in the hopes of getting a step ahead of Chuck.
Sam and Dean hit the road to help an old friend, but it appears that their luck may have finally run out and they are the ones who may be in need of rescue.
Sam and Dean press their luck in a winner-takes-all game of pool; Castiel hunts down a would-be murderer but not for reasons one might think.
Sam and Dean respond to a frantic call and assist in an extraordinary and heartbreaking rescue; Billie surprises everyone with a visit to the bunker.
A search for the one thing that may give the Winchesters an edge against God leads Sam and Dean to Jo's door and to a secret that may have died with Ruby; Castiel asks Jack to do the unthinkable to help the brothers in their quest.