The CW has released 13 episode stills from the eleventh episode of Supernatural‘s eighth season, “LARP and the Real Girl,” featuring the return of fan favorite guest star Felicia Day.

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According to the synopsis, this episode will feature Sam and Dean investigating the “mysterious deaths of two LARPers (Live Action Role Playing) who were playing a game entitled Moondoor.” They come to find that “the Queen of Moondoor is none other than Charlie,” the fangirl hacker they worked alongside in season 7’s “The Girl with the Dungeons and Dragons Tattoo.”

Together, they “learn that a fairy has been commandeered to harm people and the only way to stop her is to find her master.”

This episode will not be Supernatural‘s first foray into LARPing; it was previously explored in season 4’s “The Monster at the End of This Book” and season 5’s “The Real Ghostbusters.” This will also be the show’s second episode with fairies, the first being season 6’s “Clap Your Hands If You Believe.”

“LARP and the Real Girl” airs Wednesday, January 23 at 9 p.m. ET.

Looking for more ‘Supernatural’?

Check out the episode synopsis, promo stills, and a preview clip from the mid-season premiere, “Torn and Frayed,” airing Wednesday, January 16.

We also have an episode synopsis for episode 12, “As Time Goes By.”

And finally, check out The CW’s poster and video congratulations for Supernatural‘s two People’s Choice Awards.