Scooby-Doo e i suoi amici si dirigono verso la spiaggia di Blowout per prendere parte a una grande festa. La presenza dei Pirati Fantasma rovina però l'atmosfera, che la Mystery, Inc. proverà a risanare con le sue indagini.
University professor George Kingsley is struck by gangsters while crossing the street, leaving him with brain damage and one of the gangsters, Cannon, paralyzed. Kingsley's friend Dr. Sovac attends to both men, and when Cannon offers him a reward for aiding his recovery, Kovac transplants part of Cannon's brain into the dying Kingsley's skull, creating a dual personality.
Cornelia, accompagnata da un gruppo di amici, si reca in una solitaria villa di campagna, ospite di Mark. La donna non è affatto preoccupata dalle voci secondo le quali nella zona di aggirerebbe "il pipistrello" un pazzo omicida. Un giorno il cassiere della banca dello zio di Mark scopre un ammanco di un milione di dollari. Mentre il cassiere viene arrestato, il direttore dell'istituto di credito confessa al dottor Wells, amico di Cornelia, di essere lui l'autore del furto. Wells lo uccide, ma a sua volta viene fatto fuori perché ha scoperto la vera identità del "pipistrello".
A prisoner undergoes experimental brain surgery in order to get early parole. He released but has no memories. Things get dangerous when a group of thugs go after him in search of loot he hid before his amnesia.
A dishonest lawyer devises a scheme to rob a bank by recruiting criminals he has represented to do the job for him. When the robbery is completed, he learns that the "loot" from the vault is in fact a microchip containing top-secret information.
A young married couple whose plans for their life together haven't turned out as expected decide to rob the bank where the husband works of $100,000, then hide the money in a safe place and return for it after they serve out their sentences. All goes according to plan until they get out of prison, when they find that they're being trailed by an insurance investigator and the husband's old cellmate, who has decided that he wants a cut of the money.
An embezzler who expects to serve his time in prison and then pick up his buried loot is in for a surprise.
A publisher bets an author that he won't be able to write a romantic adventure novel while on a walking trip from New York to San Francisco.
A retired judge who opens a private detective agency and her ex-con associate try to track down $750,000 in bank robbery loot.