Tired of the loud and impudent Brindles as neighbors, the Lawsons concoct a fake earthquake to scare them into moving.
Brandon Brindle begins a father war when he finds that a golf-crazed Ted has been neglecting Jamie.
A vaudeville actor becomes convinced Vicki is his long-lost daughter.
Jamie tries to recover his respect in class when his mother comes in as substitute teacher by trying to humiliate her out of her job.
During Jamie's part-time gas station job, Vicki fine-tunes a car to go 50 miles a gallon, causing oil companies and oil sheiks alike to drop by the Lawsons' door.
When unseen Vicki is struck by lightning and begins influencing objects around the house, the shook-up and unwary Lawsons call in a pair of hapless ghostbusters.
Ted brings back ""Bad Seed"" Vanessa, who again takes Vicki's place, locks Vicki in her/its cabinet and joins the family to Hollywood, where Ted must repair a movie's robot while Vanessa mugs into a screen test on the sly.
L.E.S. is back, and despite Ted's assurances that the rogue A.I. program has been rendered harmless, it comes back in a big way by possessing Vicki's body (chassis?) as its own.
To prevent Drummond from seeing his "F" in geometry, Arnold arranges to have Drummond's signature forged on his report on his report card, but the scheme backfires when Drummond insists on a personal inspection of Arnold's grades.
Benny, an old college chum of Ted and Joan's is up to his same trashy school paper tricks in a big city rag now, fabricating a tabloid feature which by sheer chance ""exposes"" Vicki as a robot just as she's about to join a fashionable clique of girls.
Working together fuels an attraction between Max and Barbara.
Prompted by Ted and his class to get his school reading assignment going, Jamie videos a book report based on a 1940s P.I. named Rick Savage.
Arnold is faced with a dilemma when his friends insist he take a cute cheerleader to the dance instead of the girl Arnold really likes who they consider an "ugly duckling."