The beloved wife of one of the main cast members of "Supernatural" season 13 will be featured in the hit CW series next week. Episode 13, titled "Devil's Bargain," will introduce a mysterious nun whose impressive skill has caught the attention of Lucifer (Mark Pelligrino). The episode will also reveal the progress of Asmodeus (Jeffrey Vincent Parise) as he continues to search for Lucifer's son, Jack (Alexander Calvert).

Jensen Ackles' wife, Danneel, will be one of the guest stars of "Supernatural" season 13 episode 13 next week. The actress will portray the role of Sister Jo, a known faith healer in town with her miraculous ability to restore a person's health. This will mark the first appearance of the real-life couple together on the show, with Jensen playing Dean Winchester for the past 12 seasons, according to Variety. To note, this will not be the first time that the real-life wife of a Winchester brother has appeared on "Supernatural." Actress Genevieve Padalecki, wife of Jared Padalecki, played the role of a demon named Ruby in the past seasons.  

It appears that Sister Jo's healing ability is impressive enough to get the attention of Lucifer. With this, the fallen archangel will try to lure the mystic healer to his side by offering her a deal. The motivation of Lucifer to strike a deal with the nun is unknown, but the best guess for now is that the devil is once again up to no good.

If ever Lucifer is about to do something nasty, Dean, together with his brother, Sam (Padalecki), and Castiel (Misha Collins), will be there to foil whatever evil plans he has concocted in "Supernatural" season 13 episode 13.

Meanwhile, Asmodeus is getting closer to locate Jack, who has been missing for quite a while. The demon intends to use Lucifer's son to gain more power in Hell, but there is no guarantee if Jack will be easily manipulated by Asmodeus if ever he is found.

In the previous episode, the Winchester brothers had a hard time dealing with the witches, especially since Dean was placed under the spell of two witch sisters, Jamie  (Jordan Clair Robbins) and Jennie (Elise Gatien). The brothers also had to face a former big bad of the series, Rowena (Ruth Connell), who was resurrected from the dead using a powerful book of spells stolen from the Winchesters.

"Supernatural" season 13 episode 13 will air on Thursday, Feb. 8, 8 p.m. EST on the CW.