A World War II Nazi robot attacks Cassidy at her radio station. She goes to the gang for help, explaining robots have been attacking her for weeks. The gang discovers they’re coming from under the sea, so Daphne recruits her babysitting charges, Tom and Tub to take them to The Midnight Zone. As they approach The Midnight Zone, the gang is attacked by robots. They stumble upon a base, where the robots are being manufactured. They discover the corpse of Abigail Gluck, a former member of the Benevolent Lodge of Mystery, who says “Nibiru”, then discover Pericles is behind the robots. They escape as the base begins self-destructing, but Cassidy stays behind to hold open the jammed door. Everyone returns to the surface except Cassidy. Pericles gets the sixth piece of the disk.
