The description of Supernatural season 13 episode 15.
 
“A Most Holy Man” — (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)

DIVINE INTERVENTION - Sam (Jared Padalecki) and Dean (Jensen Ackles) are close to collecting everything they need to open a rift into the apocalyptic world and possibly rescuing Mary (guest star Samantha Smith) and Jack (Alexander Calvert). The one missing ingredient leads the Winchesters to a black market for religious relics where everything is not always as it seems.

Amanda Tapping directed the episode written by Robert Singer & Andrew Dabb (#1315).
 
Ah, so Sam and Dean are still trying to get to the AU. What do you think the missing relic is? What is going on in the black market for religious relics? Give us your thoughts in the comments or in the discussion thread for episode 15.