To fight Amara, the Winchesters need all the help they can get. Any help. Even douche help.
After seeing Chuck again, the boys are at a loss but after a quick chat and a sudden teleport back to the bunker they start to realize who they are dealing with. Sam is pretty nervous and excited by the whole thing but Dean...not so much.
In this week's episode, old ties are severed and we finally learn the truth behind the Darkness.
After learning that Len (the soulless stalker behind the Lissie Borden house) was killed, the Winchesters make their way back to Fall River, Massachusetts and learn that another girl has recently had her soul stolen by Amara.