Captain Caveman and the Teen Angels (1980)

S01E07 Cavey and the Murky Mississippi Mystery

Captain Caveman and the Teen Angels embark on a riverboat cruise along the Mississippi River. During their voyage, they uncover that a shipment of nuclear material has vanished into the waters. Determined to solve the mystery, Captain Caveman and the Teen Angels delve into the investigation, ultimately revealing the presence of a mysterious creature lurking beneath the surface.