The seventh-season opener, a parody of "Honey, I Shrunk the Kids," sees Urkel's transformation chamber going berzerk. The nerd and flustered foil Carl are shrunk to two inches tall, and as a result must work together to dodge hazards such as rolling fruit and large house cats.
Urkel and Laura accidentally meet in the bathroom, both of them stark naked! The two must deal with their emotions from this embarrassing meeting. Carl, meanwhile, does a favor for a neighbor and keeps hold of a watch (intended as an anniversary gift for the neighbor's wife), but Harriette thinks the gift is for her.
Steve meets a gorgeous bug collector named Agnes Prizker and fantasizes about kissing her, which he does by accident. However, he reminds himself that he's in a relationship with Myra and goes to Laura about it. She encourages him to tell his girlfriend about it. Should he dare tell Myra the truth about what happened? Meanwhile, Carl reluctantly allows Nick Neidermeyer to join in his poker night with his buddies, per Harriette's recommendation. She immediately regrets her decision in letting her selfish boss join in and tells him off. She even goes as far as daring ...
In his teacher's absence, Urkel is asked to be substitute teacher of his English class. The other students take quick advantage of the situation and drive the nerd to the breaking point. Urkel responds by transforming himself into Stefan, who in the alter ego is able to gain control of the class.
Greta lands in hot water with her father when Eddie brings her back after her curfew. When he won't allow her to see him again, Greta decides to buck her father's order by making him think she's dating Urkel (who is actually Eddie's gofer). Meanwhile, Estelle is being audited by the Internal Revenue Service, but Carl's attempts to fix the situation only uncover his own problems with the taxman.
Urkel develops an extreme fear of thunderstorms after he is constantly struck by lightning. Carl helps the nerd work through his fear and determine why he has become a human lightning rod. Meanwhile, Laura and Myra apply for a sales job opening at Ferguson's.
Urkel is in charge of designing the Vanderbilt High's senior class float, but nobody seems interested in a project that, due to the nerd's involvement, will surely be doomed. However, interest slowly grows and the seniors actually get to know - and appreciate - each other's company.
Carl's "bah humbug" attitude puts a damper on Urkel's plans to decorate the house for Christmas ... until the nerd announces that there's a contest for best light display and that there are prizes. Meanwhile, Harriette and Mother Winslow puts their foot down when Eddie and Laura refuse to participate in the family's holiday activities.
Laura becomes worried about her figure and invests in some diet pills. She doesn't count on Urkel mistaking her pills for his vitamin supplements, and in the process, he is nearly involved in a tragic accident as he unwittingly destroys the Winslows' garage.
Carl has had it with Urkel's constantly backfiring scientific contraptions and demands they be placed in storage. One night while they are putting everything away, a gang of robbers breaks in and demands everything. Carl and Urkel trick the thugs into letting them demonstrate the transformation chamber ... and they emerge as Bruce Lee Carl and Bruce Lee Urkel to defeat the bad guys.
Eddie enrolls in a ballet class to improve his basketball skills. He is invited to participate in an upcoming recital and chooses Greta as his parter, but on the day of the show, Myrtle shows up instead.
In this episode paying tribute to the Big Brothers Big Sisters of America program, Urkel is paired with a streetwise youth named 3J, whose smart mouth is the cover for an embarrassing secret: He can't read. Urkel vows to help 3J learn how to read and discover the worlds that are opened up through books.
Urkel creates an aphrodisiac that accidentally gets sprayed on Laura. Laura falls head-over-heels in love with Urkel, but what happens when the potion wears off? Meanwhile, Carl and Harriette encounter nothing but frustration at the airport when they try to book a flight for their second honeymoon.
A con artist Eddie and Waldo into going to an exclusive sports bar where Chicago Bulls' players hang out, then leaves them with the bill. Eddie decides to go to his father for help, and Carl is easily able to recover his son's losses.
Carl lands a job as security guard at a movie studio ... and in the process, gets a leading role in a big-time movie. However, one of the scenes involves his character passionately kissing the movie's beautiful leading lady, leaving the portly cop with a moral dilemma.
While Urkel is working on a cloning experiment with his transformation chamber, the contraption goes kablooey. The aftermath has Urkel cloned, creating double trouble for the Winslow household! Laura decides to make lemons out of lemonade and suggests that one of the clones be made into a permanent Stefan.