Professor Kumquat invited the gang over to see his new time machine. While Shaggy and Scooby are inside, Daphne accidentally hits a lever, and Shaggy and Scooby get exchanged with a pre-historic barbarian named Bonax. Bonax announces he does not like sorcerers, and runs out. Meanwhile, Shaggy and Scooby are screwing around in the past, and get captured by a hungry cyclops. Bonax attacks a bus sign, gets hurt, and announces he wants to go home.
They bring him back, and the machine exchanges him with Shaggy and Scooby. After they return, the time machine collapses.
- Professor B.O. Kumquat (single appearance)
- Driver (single appearance)
- Prehistoric elephant (single appearance)(no lines)
- Present day
- New York
- Professor Kumquat's laboratory
- New York
- Distant past
- Cyclops's cave
- The Mystery Machine
- Female driver's car (destroyed)
- Disguises: None.
- Scooby Snacks bribe: 0.
- "Zoinks" count: 0.
- "Jeepers" count: 0.
- "Jinkies" count: 0.
- Bonax the barbarian seems to be a parody of Conan the Barbarian.