On this episode of Supernatural…

Mary recruits Wally to help her with a British Men of Letters assignment.

She also gets Sam and Dean involved.

They track down a prince of hell named Ramiel.

Mary has been assigned to retrieve an item Ramiel has, which turns out to be the Colt.

Wally is killed.

Crowley reveals that he had demons watching over Ramiel and how he became King of Hell.

Ramiel stabs Castiel with Michael’s spear.

The brothers and Mary fight Ramiel and manage to stab him with the spear.

Crowley breaks the spear, saving Castiel.

Crowley returns to Hell and it is revealed that Lucifer is there with him.

Mary meets up with British Men of Letters and hands over the Colt.