Episode Description: Beware, spoilers! To read - hover over the text.
Dean's pissed, can't reach Crowley, who has promised him to find the First Blade. When Crowley finally calls Sam and Dean, he tells them that he's been injecting human blood, and now he needs their help. To top it all off, a demon who got out for his blood, gave him and warned Abaddon that Crowley together with his brothers, the Winchesters are searching for the First Blade. Now the brothers must find the blade before Abaddon will do, so they turn to former member of the brotherhood of the Keepers of Knowledge.