On this episode of Supernatural…
Sam and Dean scour the Men of Letters info and discover a demon dungeon, and tapes of a priest practicing curing demons.
The two learn that Abbadon was connected and sew her head back to her body to complete the third trial using her. She escapes.
Crowley is killing off Sam and Dean's past saves in an effort to get the demon tablet from them.
Metatron convinces Castiel to help him complete the trials and close the Gates of Heaven.