We have the synopsis for Supernatural season 15 episode 2.
 
SUPERNATURAL
“Raising Hell” – (8:00-9:00 p.m. ET) (TV-14, DLV) (HDTV)


SENDING OUT AN SOS – Sam (Jared Padalecki), Dean (Jensen Ackles) and Castiel (Misha Collins) call on Rowena (Guest Star Ruth Connell) to help keep the evil souls at bay and get an unexpected assist from Ketch (Guest Star David Haydn-Jones). Robert Singer directed the episode written by Brad Buckner & Eugenie Ross-Leming (#1503). Original airdate 10/17/2019.

Source:

The CW

 
Rowena and Ketch return! The boys haven't vanquished the evil souls completely. What do you think? Let us know in the comments or in the discussion thread for episode 2.