The gang tracks a jewel thief back to the house of inventor Dr. Jekyll.
Daphne unknowingly buys a cursed mask at an antique shop.
While fishing, the gang hooks a caveman frozen in a block of ice.
The gang finds an unconscious bank guard with a mysterious blank paper.
The Mystery Machine breaks down outside a haunted Southern mansion.
A crazy robot operates a carnival after closing time.
A puppet takes a violin case full of money from Shaggy and Scooby.
The gang finds flying saucers and a spooky skeleton in an abandoned airfield.
A millionaire promises his fortune to anyone who will spend the night in his haunted castle.
The kids stumble upon an abominable snow creature while on vacation.