The official press release
“Byzantium” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV) OUT OF THE DARKNESS – When Sam (Jared Padalecki) and Dean (Jensen Ackles) join forces with an unexpected ally, the outcome will alter the course of two lives. Meanwhile, Heaven faces an attack from a dark force, driving Castiel to make an enormous sacrifice to make things right. The episode was directed by Eduardo Sanchez and written by Meredith Glynn (#1408). Original Airdate 12/6/2018.
The original trailer
Tonight on #Supernatural— Andrew Dabb (@andrewdabb) December 6, 2018
"Don’t you give me that 'meant to be' crap."
For more spoilers, BTS photos, rumors and more see the discussion thread for episode 8.
Who is the unexpected ally? It looks like it could be Lily Sunder from the trailer. Dean is being hit hard by Jack's upcoming death. Angel Radio is sending out a distress call and all the gates to Heaven are open. Jack has a surge of power. Can he help with the situation in Heaven? Or is he causing it? Whose lives will be altered? What sacrifice will Cas make? Give us your thoughts in the comments or in the discussion thread for episode 8.