The Winchester boys are getting sucked into the world of “Scooby Doo” in the upcoming “Supernatural” episode ‘ScoobyNatural,’ part of the show’s 13th season. EW laid out the plot details earlier in the week… “After a case-of-the-week puts Dean in a wrestling match with the live plushy — not the show’s first — a grateful pawnshop owner offers the guys a free TV to say thanks. Sam’s not too keen on the idea, but Dean’s never one to turn down a gift. So, he takes the TV back to the bunker to create his “Dean Cave.” Only, everything’s not as it seems with the present. Spoiler: The boys are sucked into a Scooby-Doo cartoon.” The site continued, “Dean’s extensive Scooby knowledge will come in handy rather quickly when he recognizes the episode they’re in (which is based on the 1970 Scooby-Doo, Where Are You! episode “A Night of Fright Is No Delight”). But this episode isn’t exactly a repeat. This time, there’s a Supernatural-level monster at work.” Check out the episode’s teaser trailer below! “ScoobyNatural” airs Thursday, March 29, at 8 p.m. ET on the CW.