The Caped Crusader removes his duplicate house key from his utility belt and uses it to jam the key duplicator's mechanism, releasing him. He quickly Bat-pummels Joker's minions, rescues a now wax-immobilized Robin from the wax spray machine, returns him to The Batcave, and restores him to normal with the aid of Bat Wax-solvent. Meanwhile, Joker has perfected a new little box that acts as a time machine, with which he hopes to cause the expected havoc by controlling time. He also, it turns out, plans to place a hallucinogen in the city's water supply so that all of Gotham will be in thrall to him.

Alfred helps out the heroes by arranging to pose for his lookalike cousin Egbert, the night watchman at Gotham Reservoir, and he introduces his newly-designed Alfcycle, which he rides to the reservoir. There, after switching places with Egbert, Alf manages to victimize The Joker and his gang (at gunpoint!) with his own insidious time machine, freezing and reverting them in time! Batman and Robin arrive just in time to wrap everything up when Alfred unknowingly switches off the device. Later, Aunt Harriet, arriving home from a movie theater, runs out of gas and seeks assistance from Alfred (posing as Egbert again); just then, The Dynamic Duo (with a bag lunch for Alf) show up and aids Harriet.

NEXT WEEK: Carolyn Jones as Marsha, Queen of Diamonds faces Batman!