A street gang causes trouble for the Winslows, and things become personal when they vandalize Rachel's Place and attack Eddie. Carl wants to take matters into his own hands, but Urkel decides to infiltrate the gang and tricking them into confessing.

A space-age potion turns Urkel into Stefan Urquelle suave, smooth-talking life of the party, but Laura finds she soon misses the old Urkel.

Steve schemes to take the reluctant Laura to a hot-ticket concert; Carl takes out his frustrations on the family, unable to shake the memory of a shooting he feels he could have prevented in the aftermath of a hostage case.

Laura's guardian angel shows Urkel what it's like to be Laura.

The NBA's Larry Johnson plays Grandmama (his TV-ad alter ego), who becomes Urkel's new partner in a city basketball competition after Eddie dumps Urkel for star player Kenny.

Myra rushes to Disney World, fearing something is amiss with Urkel. And it's no Mickey Mouse worry: he's proposed to Laura by the time Myra arrives.

At the drive-in movie, Laura's new boyfriend (Kevin Mambo) has trouble getting the message that no really means no; and at home, Carl just doesn't get it when his insults drive Harriette to retaliate.

Carl refuses to accept Eddie's story that he got pulled over for speeding ""because he was a black in a white person's neighborhood"" ... until the portly cop finds out the ugly truth. Meanwhile, Urkel tells Richie that he has nothing to fear when going to the dentist, but the nerd soon regrets his move when he has cavities of his own that need filling.

Richie brings home a homeless person on Christmas.

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.

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

When accident-prone Steve is blamed for a chemistry lab explosion, Laura represents him at a school trial.

Carl bribes Laura to go bowling with Urkel and dreams that they are married with four kids who look like Urkel.

Laura doesn't want Stefan to change anything about himself for her, while Urkel - as his nerdy self - is a 10 in Myra's eyes. Meanwhile, hoping to improve his vision, Carl steps into Urkel's transformation chamber.

After a vengeful Myra tampers with Urkel's transformation chamber, Carl steps into it and steps out as an Urkel-like nerd.

After failing to foil a robbery, Carl is assigned to protect Urkel, who stopped the thief; the boss's daughter comes on to Eddie.

As a finalist in a contest, Urkel invites the Winslows on his trip to Disney World, where Laura has a fantasy romance---with Stefan Urquelle.

To avoid being banished to Russia (where his parents are moving), Urkel--and his termites--move in with Eddie and Waldo.

For a class project, Laura is "married" to Steve for a day. Meanwhile, one of Carl's sergeants casts his eye on Rachel.

Carl gets trapped inside a railroad boxcar with Steve and a cargo of cattle.

A charming, mysterious figure, claiming to be a family friend from the past, comes to visit - and turns out to be Harriet and Rachel's long-lost father.

Urkel plays bumbling, hard-boiled gumshoe Johnny Danger in a 1940s film noir spoof with Laura as a sultry client who needs protection for her aunt Rachel singer and supper-club owner marked for murder.

Carl hopes to practice stress management by keeping his cool, but he nearly blows a gasket teaching Urkel to drive.

Eddie gets more than he bargained for when he and his pals sneak into R&B singer Tracie Spencer's hotel room in search of tickets to her concert; and Carl is in for a big surprise when he discovers Harriette's diary.

Myra enlists Laura's help in snaring "hot stuff" Urkel; Eddie asks Carl a lot of questions after buying a hot car stereo.