High-Tech House of Horrors

The gang ends up going to a future fair; however, the main attraction the house of the future is closed due to the mysterious disappearance of a teenager. The creator of the house, Professor Ostwald (reappears in E-Scream), tells the gang that nothing is wrong; however, after Daphne disappears the gang has to go back to the house and are soon being chased by a robot butler.