Supernatural season 9, episode 13 “The Purge” will see the Winchesters taking on an undercover case at a spa.

After rescuing Sam from Gadreel, a guilt-ridden Dean went on a solo mission to hunt Gadreel down, though he took a detour with Crowley to find the First Blade, the only weapon that can kill a Knight of Hell. Dean took the mark of Cain from Cain himself in order to wield the First Blade against Abaddon.

Meanwhile, Castiel and Sam returned to the bunker where Castiel continued healing Sam’s lingering trial damage. The Winchesters reunited after learning that Garth was in trouble and finally agreed to hunt together again, though Sam isn’t ready to trust Dean beyond a working relationship.

Read our recap of last week’s episode, “Sharp Teeth,” here.

The official synopsis for Supernatural season 9, episode 13 “The Purge” reads:

SAM AND DEAN GO UNDERCOVER AT A SPA – Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate recent murders where the victims were hundreds of pounds lighter after their deaths. Suspecting witches, the two go undercover at a fancy day spa that all of the victims had attended for weight loss. While Sam is hired as a fitness instructor, Dean takes kitchen duty. After Dean swipes some tainted food and passes out, the guys realize someone is drugging the guests and literally sucking all of the fat out of them until they die. Phil Sgriccia directed the episode written by Eric Charmelo & Nicole Snyder (912).

Meanwhile, promotional stills from the episode have at least one of the Winchesters showing some skin:

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Finally, watch a clip from the episode:

Supernatural season 9, episode 13 “The Purge” airs Tuesday, Feb. 4 at 9:00 p.m. ET on The CW.

Will you watch ‘Supernatural’ season 9, episode 13 ‘The Purge’?