[Warning: Spoilers ahead for those not caught up on season 12 of Supernatural]

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Supernatural has gone to some really dark places in its 12 years on the air, with gruesome deaths, heartbreaking drama, and some truly disturbing ideas about the End of the World. To keep fans from getting worn down with all the angst, the series regularly interrupts the larger story arcs with back-to-basics monster-hunting adventures and some goofier one-off episodes that experiment with crazy realities and over-the-top humor.

The two-episode season 12 finale of Supernatural had a startling array of shocking twists, including an alternate reality and a boatload of character deaths. It sounds like the self-sacrificing Crowley (Mark Sheppard) is gone for good, but the fate of everyone's favorite angel, Castiel (Misha Collins), is still unclear.

While we're not sure yet what will happen earlier in season 13, CinemaBlend reports that Cass will be making an appearance in the previously-announced Scooby-Doo episode. Star Jensen Ackles (Dean) shared at San Diego Comic-Con that the Supernatural triumvirate were excited to do the voice work for the upcoming animated story.

"It'll be very Scooby-Doo-esque. Just a little slightly darker version of Scooby-Doo, but I will say that when we went in and did the recording, it was Jared [Padalecki], myself, and Misha. We recorded, we put cameras and there were GoPros all over. All of that will be on special features, but we were like vibrating we were so excited about it. We were so thrilled, and the whole process of doing the dialogue, we were having a scene. It's ridiculously funny."

Considering how far outside the realm of the show's "normal" universe a Scooby-Doo episode is, it's easy to imagine how Castiel could take a ride in the The Mystery Machine and still remain dead in the real world. Viewers will have to wait to see if Collins will reprise his role as Castiel, a different character, or as a ghostly apparition in what could be part of a cartoon hallucination, nightmare, or the the devilish world-building of a trickster.

Resurrections are also common on Supernatural, though Castiel's death via angel blade makes things a lot trickier. It hardly seems a coincidence that the Winchesters were last seen in the company of Lucifer's hybrid child, however, a being possessing even more power than its archangel father.

While Supernatural has done some crazy things in 12 seasons, including super meta episodes featuring bromance fan fiction and a prophet publishing Sam and Dean's story via trashy paperback novels, an animated Scooby-Doo version of the show may be its weirdest idea yet. It sounds like the cast had fun making it, though, and the whole experiment may turn out to be worthy viewing if it gives us another dose of Castiel's deadpan humor and Dean chowing down on 12-foot-tall cartoon sandwiches with Shaggy and Scooby.

The season 13 premiere of Supernatural will air Thursday, October 12 on The CW.

Next: Jensen Ackles Dreamed Supernatural’s Final Scene

Source: CinemaBlend