There, the gang learns that a Caveman haunts the museum, and when Scooby goes to the dinosaur exhibit, a pterodactyl takes Shaggy when he showed Scooby a drumstick, promoting to save him again. Saving Shaggy, Scooby discovered a large, oil-covered bone in the exhibit, then later finds a contract from Stanton and gives it to Velma. Afterwards, Fred and Daphne are trapped in an aquatic exhibit with the Caveman but are then freed by Scooby in his archer costume. Though in reality, the Caveman was not actually there with them anymore. Scooby then confronts the Caveman, defeating him in a UFO battle. The Museum's head of security, Joseph Grimm, is revealed to be the Caveman as part of a scheme to sell the valuable petroleum deposits located under the Museum, being pumped up by the bobbing dinosaurs around the museum. Velma correctly deduces from this chain of events that Stanton is responsible for the thefts, having framed Jed and sent the gang on a wild goose chase to distract them.
