The CW has released an official spoiler description for the November 16 episode of Supernatural which is called “Tombstone.”
Here’s the write-up:
GO AHEAD…MAKE MY DAY – Castiel (Misha Collins) is reunited with Jack (Alexander Calvert) and together with Sam (Jared Padalecki) and Dean (Jensen Ackles), they head to a sleepy old western town to investigate a murder. Dean gets to live out his boyhood fantasy when he comes face to face with a famous, gun-slinging outlaw. Nina Lopez-Corrado directed the episode written by Davy Perez (#1306). Original airdate 11/16/2017.
UPDATE: We now have some preview images! Welcome back, Cas!