What we know about Supernatural season 13 episode 13.
We have the official synopsis.
 
“Devil’s Bargain” — (8:00-9:00 p.m. ET)

DANNEEL ACKLES GUEST STARS – Sam (Jared Padalecki), Dean (Jensen Ackles) and Castiel (Misha Collins) search for Lucifer (Mark Pellegrino) who, meanwhile, strikes an unlikely deal with a local faith healer named Sister Jo (guest star Danneel Ackles). Asmodeus (guest star Jeffrey Vincent Parise) inches closer to finding Jack (Alexander Calvert). Eduardo Sanchez directed the episode written by Eugenie Ross-Leming & Brad Buckner (#1313). Original airdate 2/8/2018.
 
The original trailer
 
 
 A Sneak Peek
 
 
Inside Supernatural
 
 
The promotional pictures
 
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Daneel Ackles is giving interviews about her role
 
 
 
So excited for Danneel to be on Supernatural! What do you know about her first episode? — Crystal
The episode was directed by Eduardo Sanchez, who helmed The Blair Witch Project, so you wanna take a guess at what that means? Actually, it might not be quite what you’re imagining. According to Danneel Ackles, the episode’s a bit “scarier” than usual, but nothing out of the ordinary. “It was pretty straightforward,” she says “There’s some stuff coming down the line, like the Scooby-Doo episode, so this one pretty much brings us back to being a very straightforward Supernatural episode.” But there is one question Danneel wants to clear up: “There were no references to the fact that Jensen and I know each other. Some people were asking if we were going to do something like that.”
 
Checkout the discussion thread for episode 13 for BTS pictures, rumors about the episode and more.
 
We get Danneel's episode! She's going to interact with Lucifer. What type of bargain do you think they will make? Cas is looking for Lucifer. He also finally reunites with Sam and Dean and tells them about Michael trying to jump universes. Lucifer declares that he's back. Will Lucifer reach his full strength? Or is he overestimating his comeback? Will Sister Jo actually heal Lucifer? Give us your ideas in the comments or in the discussion thread for episode 13.