Urkel and his transformation chamber move in with the Winslows--where he creates havoc by shrinking himself and Carl in an experiment gone awry.

Steve and Laura have an accidental encounter in the nude; Harriette unwraps an anniversary gift she thinks is from Carl.

Feelings of guilt bug Urkel after he meets a knockout of a fellow insect collector; Harriette's boss annoys Carl and his buddies as a guest at their poker games.

An English class full of hooligans gives substitute teacher Urkel a pain--and an idea on how to get through to his defiant charges.

Greta's dad forbids Eddie to date his daughter--but he welcomes Urkel as her new escort.

Myrtle, Urkel's cousin from Biloxi, squares off with Greta over Eddie's affections.

When Laura's emotions go into overdrive for a daredevil drag racer, Urkel challenges him to a high-octane grudge race at the local drag strip.

A family feud erupts on a TV talk show featuring Urkel, Stefan and cousin Myrtle, along with Laura, Eddie, Myra and Waldo.

Laura and Myra's friendship turns stormy as they compete for the same job; a rainstorm renders Urkel "a human lightning rod."

Urkel could use some help designing a float for homecoming; and Carl believes he's helping his mom by encouraging her to "slow down."

Carl's bah-humbug attitude toward Urkel's rooftop Christmas decorations changes once he learns that the family could win a decorating contest.

Carl backpedals on his refusal to teach Urkel to ride a bike when it seems that the clumsy kid might wreck his new car.

Carl, Urkel and Eddie hop a plane for Central America to bust Waldo out of jail; and Harriette talks Laura into a blind date.

Teamwork and the transformation chamber give Carl and Urkel an edge against thieving gang members.

Carl issues an ultimatum concerning Eddie's drinking. Meanwhile, female fans become intoxicated with Stefan Urquelle.

At a recital, Eddie and Greta's pas de deux from "Swan Lake" is interrupted by an ugly duckling from down south--Myrtle.

Urkel volunteers as a Big Brother to a street kid who harbors a secret about his reading ability.

Urkel's love potion prompts a sudden devotion from Laura; airline nightmares plague Carl and Harriette on their second honeymoon.

Waldo can tap dance with pizzazz but he's a klutz on the basketball court. Elsewhere, Carl is turned down for a loan to pay Laura's tuition to Harvard.

Eddie and Waldo fall victim to a scam; Urkel's glue provides Laura with a super facial.

The school prom brings one disaster after another for Laura. First her date cancels, then she's paired with the walking disaster Urkel at the dance, where the group Immature performs.

Carl lands a movie role but feels he's cheating on Harriette when he tries to do a love scene with a starlet.

Urkel discovers that "I can clone stuff!"--which means double trouble for the Winslows.