Supernatural has added a tantalizing midseason finale title to the schedule.

'Supernatural' Season 11: Lizzie Borden Episode Takes A Dark(ness) Turn, Plot Revealed

Crowley kicked off season 11 with murmurings of Lucifer and Michael, and those whispers will make their way to the Winchesters before the winter hiatus. Between Adam and the archangels, the boys will certainly have their hands full in episode 9, "O Brother, Where Are Thou?"

The title comes as part of a six-episode leak courtesy of Spoiler TV (see the full list below). It is unknown if the title refers to Sam (Jared Padalecki) and Dean's (Jensen Ackles) half-brother, but Ackles has confirmed that Adam's name will defiantly be bandied about during the upcoming episode.

'Supernatural' Season 11: Sam To Make A New 'Friend', Jared Padalecki Tease Upcoming Relationship

"In the episode that we are currently filming now, the subject of Adam gets brought up," Ackles teased as work began on "O Brother, Where Are Thou?"

Will talk of the Cage harbinger the return of Lucifer, Michael, Adam, or all of the above? The Darkness is bad news, and Heaven or Earth may need some extra muscle to fend her off. Sam brought the Darkness into the world, but even he would be loath to spring the Devil in order to clean up his mess.

Check out the alleged titles for episode 6 through 12.

Episode 6 - "Our Little World"
Episode 7 - "Plush"
Episode 8 - "Just My Imagination" (Directed by Richard Speight, Jr.)
Episode 9 - "O Brother Where Are Thou?"
Episode 10 - "The Devil in the Details"
Episode 11 - "The Sound of Silence"
Episode 12 - "Don't You Forget About Me"

Supernatural airs Wednesdays at 9 p.m. ET on The CW.

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