Supernatural is turning 200, and the Winchester brothers will celebrate by stumbling upon one of their strangest cases yet.

Dean & The Mark Of Cain Part 2, Jensen Ackels Talks Future 'Supernatural' Problems

In the "musical-ish" episode, Carver Edlund/Chuck Shurley's (Rob Benedict) Supernatural books will pop up once more, but this time a few intrepid students will set them to music.

"It's a musical, but not in the way you would think," explained series creator Eric Kripke, according to Give Me My Remote. "The boys stumble onto an all girls high school doing a production of Supernatural, so I would say it's Supernatural meets Rushmore. Every scene is loaded with references to previous episodes so it's really a love letter to the fans."

An Evil Returns From Oz On 'Supernatural', What Will Charlie Bring Back For The Winchesters?

Sam (Jared Padalecki) and Dean (Jensen Ackles) won't be joined by either Castiel (Misha Collins) or Crowley (Mark Sheppard) during "Fan Fiction," but Entertainment Weekly reports that a mysterious male will make a reappearance. Perhaps it will be Chuck, who mysteriously dissipated after season 5.

"[Jared] and I are the only men in the whole episode, save one person," Ackles teased, according to Entertainment Weekly.

Find out more when Supernatural airs Tuesdays at 9 p.m. ET on The CW. Click the video below to see a preview for "Fan Fiction."

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