When Scooby and Mystery Inc. visit an off-road racing competition, it's not long before strange events start to occur. A mysterious phantom racer, known only as Inferno, is causing chaos and is determined to sabotage the race. It's up to … Paige, Mike Mizanin, Kate Micucci, Grey DeLisle, Frank Welker, Matthew Lillard, Mark Calaway Added on HBO 2022-06-07. Youtube Trailer