The CW has released an official description for the February 25 episode of Supernatural, which is called “Captives” and features a haunting in the Men of Letters bunker.
…wait, it’s not going to be the ghost of Bobby? Bummer. We want it to be Bobby.

THE BUNKER IS HAUNTED — Sam (Jared Padalecki) and Dean (Jensen Ackles) are stunned to discover the Men of Letters’ bunker is haunted. Their investigation leads them to a storage facility where the demons have been keeping a prize possession. Meanwhile, Castiel (Misha Collins) is captured by Bartholomew (guest star Adam Harrington). Jerry Wanek directed the episode written by Robert Berens (914).