Here's what we know about Supernatural season 15 episode 15!
The official press release:

Gimme Shelter

MATT COHEN DIRECTS – Castiel (Misha Collins) and Jack (Alexander Calvert) work a case involving members of a local church. Meanwhile, Sam (Jared Padalecki) and Dean (Jensen Ackles) go off in search of Amara (guest star Emily Swallow). Matt Cohen directed the episode written by Davy Perez (#1515). Original airdate 10/15/2020.

The original trailer:
The promotional pictures:
AmaraSamDean.jpg AmaraandDean.jpg CasAndJack.jpg

CasAndJackFBI.jpg CasAndJackUrbanWaste.jpg CasJackCop.jpg

CasNearCar.jpg Castiel.jpg DeaninSnow.jpg

Diner2.jpg Diner3.jpg Jack.jpg

RightsideUpBadge.jpg SPN1515_HLC_0091.jpg SPN1515_HLC_0104.jpg

SPN1515_HLC_0113.jpg SPN1515_HLC_0114.jpg SPN1515_HLC_0133.jpg

SPN1515_HLC_0188.jpg SPN1515_HLC_0230.jpg SPN1515_HLC_0246.jpg

SPN1515_HLC_0281.jpg SPN1515_HLC_0287.jpg SPN1515_HLC_0293.jpg

SPN1515_HLC_0302.jpg SPN1515_HLC_0305.jpg SPN1515_HLC_0310.jpg

SPN1515_HLC_0316.jpg SPN1515_HLC_0326.jpg SPN1515_HLC_0350.jpg

SPN1515_HLC_0429.jpg SPN1515_HLC_0438.jpg SPN1515_HLC_0456.jpg

SPN1515_HLC_0537.jpg SPN1515_HLC_0546.jpg SPN1515_HLC_0562.jpg

SPN1515_HLC_0591.jpg SPN1515_HLC_0592.jpg SPN1515_HLC_0633.jpg

SamDeanAmarainDiner.jpg SamDeaninSnow.jpg UpsideDownBadge.jpg

For more rumors, spoilers and BTS information checkout the discussion thread for episode 15.
Matt Cohen comes back, but not on screen. Cas and Jack are working together on an unknown case.  Sam and Dean find Amara. What will she think about their plan to kill Chuck (and her)? Is Cas making a crossroads deal or doing another spell? Cas tells Dean there is something he and Sam should know if things go wrong. Will he tell them about deal he made with The Empty? Give us your thoughts in the comments or in the discussion thread for episode 15.