"Supernatural" Season 12 episode 12 is titled "Stuck in the Middle (With You)," and it features Mary's new mission that will put her at odds with her sons. Also, a promo that The CW released hinted that Castiel's life might be in serious danger.

According to Fansided, the previous episode showed Dean and Sam reunited with Dean's working memory, which is a relief. However, the new trailer for episode 12 is somewhat dark. Castiel can be seen dragging his broken, bruised body along the floor, and he tells the Winchesters that he does not want to see them die in his last moments.

Now fans are wondering what or who caused Castiel in such dismal condition. According to rumors, Mary Winchester could be the reason. She reappears in the next episode and recruits the trio for a case. However, she failed to mention that she's been working with the British Men of Letters, who will definitely double cross the team.

Meanwhile, the "devil baby mama drama" are still on the hunt for Kelly and Lucifer's spawn. According to Entertainment Weekly, at this point, it's going to be less about where Lucifer is than the fact that he has a child on the way. Showrunner Andrew Dabb said that Lucifer is a character that even when he's back in the cage, he's been active in our world. Dabb added that for "Supernatural" Season 12 episode 12, the show will introduce a fun extension of the mythology, and a long-forgotten Lucifer "may come out of the woodwork now that his kid is kind of up for grabs."

The official synopsis for "Supernatural" Season 12 episode 12 says: "Mary (guest star Samantha Smith) asks Sam (Jared Padalecki), Dean (Jensen Ackles) and Castiel (Misha Collins) for help on a case she's working but neglects to mention the British Men of Letters are involved. When Mary is double crossed, everything is revealed."