Steve accidentally shrinks himself and Carl in his transformation machine.
Naked Laura and Urkel unexpectedly meet in the shower.
Urkel, fearing Myra's jealousy, hides his attraction to a fellow bug collector.
Stefan Urquelle calms an unruly class when Steve tries to substitute teach.
A cool fraternity tells Eddie to lose Steve as a friend.
On the golf course, Steve accuses Carl of kissing up to his boss; Laura misses her curfew.
Urkel, who fears water, must pass a mandatory swimming course.
Steve and Myra run into trouble when they pull over to park; Carl thinks he is a lousy lover.
Carl and Urkel must land a plane after their vengeful pilot bails out.
Richie (Bryton McClure) invites a homeless man for Christmas; Steve (Jaleel White) performs an angelic act for Laura (Kellie Shanygne Williams).
Steve and Eddie eat Waldo's final exam, a cake; Carl has some news about his boss' girlfriend.
When the school bully is diagnosed with leukemia, Steve Urkel organizes a bone marrow drive; with Jaleel White, Lamont Bentley and Reginald VelJohnson.
The transformation machine turns Urkel into a karate expert to fight bullies.
After she is robbed, Laura considers arming herself, but instead she organizes a gun turn-in program.
Carl and Steve find themselves balanced on a church tower while trying to rescue Mr. Looney.
Steve accidentally transforms himself into Elvis, not Einstein, when an experiment flops; Carl and Harriette are appointed marriage counselors.
Richie's class takes a field trip to the police station with tour guide Carl trying desperately to keep the dull tour afloat; the class is impressed when he shows a criminal the dangers of his actions if he kills an innocent police officer.
After Steve is threatened, Carl acts as his bodyguard; Eddie is hit on by his boss's daughter.
Steve tags along on Laura's cheerleading trip to Omaha, Neb.; Harriette and Carl look forward to a weekend alone.
The Winslows see a counselor to discuss the family's tension and hostility.
Steve travels to Walt Disney World to participate in an inventors contest.
Steve must tell Myra that he plans to marry Laura; Eddie and Waldo lose their way.
Urkel's genetically engineered termites escape after he moves in with Eddie and Waldo.