“Advanced Thanatology” is the Community-like title for the Thursday, November 9 episode of Supernatural and The CW has released an official description!
Here’s the write-up with some new spoilers:
BILLIE RETURNS…BUT NOT LIKE BEFORE – While working on a case involving the ghost of a demented doctor, Sam (Jared Padalecki) and Dean (Jensen Ackles) get assistance from an unexpected source – Billie (guest star Lisa Berry). Castiel (Misha Collins) finds his way back to the Winchesters. John Showalter directed the episode written by Steve Yockey (#1305). Original airdate 11/9/2017.
UPDATE: We now have some photos! Enjoy: