On this episode of Supernatural…
Sam and Dean have no leads on the Darkness of Castiel.
The two take on a case after a girl falls into a coma.
They discover that Bobby and Rufus worked a case at the same house back in the day, before the apocalypse.
Bobby and Rufus discover it is a soul eater and use a sigil to trap it.
Rufus thinks it was a baku, but Bobby isn’t so sure.
Unfortunately, the sigil is broken by the new owner of the house.
Sam and Dean discover from the Men of Letters a way to kill the soul eater.
Dean is put in the nest to work on his half of the sigil while Sam works in the real world.
Dean sees Bobby before they defeat the soul eater.
Sam and Dean decide to finish another of Bobby’s cases from the past after their victory.