When Supergirl, Wonder Woman, Batgirl, Bumblebee and Katana suddenly realize they cannot remember a single moment from their Monday at Super Hero High, the young DC Super Heroes spring into sleuthing action! Suspecting foul-play, they band together to retrace their steps and uncover the mystery of who exactly stole their memories – and what nefarious plan might be afoot?

An evil sorceress transports the gang back to the age of chivalrous knights, spell-casting wizards, and fire-breathing dragons.

Scooby-Doo and his pals win an all-expense paid vacation and embark on a trip of a lifetime to a tropical paradise. Their destination however, turns out to be Zombie Island. As soon as they arrive, they realize the place looks strangely familiar and is reminiscent of a trip they took years ago, in which they became wrapped up in a mystery involving zombies. The gang soon learns that their trip to paradise comes with a price when the zombies re-emerge and attack their hotel. Will Scooby-Doo and the Mystery Inc. gang finally solve the mystery behind Zombie Island?