Watch an extended promo for the next episode of Supernatural, titled “Goodbye Stranger,” below.

This episode will feature the return of what the promo terms “The Unholy Trinity”: Castiel, Crowley, and Meg. While Castiel and Crowley have made intermittent appearances this season, Meg has been missing since the season 7 finale, when Crowley and his minions captured her.

According to the synopsis, Castiel reappears in this episode to tell Sam and Dean that “Crowley has unleashed several demons” who are “looking for Lucifer’s Crypt, which holds a valuable asset.”

Castiel, however, “lies to Sam and Dean about what it is.” We’re guessing these lies have something to do with the mind control Naomi has been asserting over Castiel since his return from Purgatory.

The three capture a demon and during the interrogation “discover Crowley has been torturing Meg, who knows the exact location of the crypt. Sam and Meg fight to hold Crowley off while Dean and Castiel go in search of the crypt.”

However, judging from the promo above, it looks like we’ll be seeing some double crosses. Though Meg and Crowley have always been enemies, it wouldn’t surprise us to see them team up to stop the Winchesters from sealing the gates of Hell permanently.

“Goodbye Stranger” airs Wednesday, March 20 at 9 p.m. ET.