During a police ride-along, Carl and Steve get stuck on a freight train.

A Halloween costume-bedecked Urkel and Laura are hostages during a bank robbery. Urkel fantasizes about saving Laura and subduing the criminal, but things don't quite work out that way. Carl, meanwhile, is able to apprehend the subject, leaving a downtrodden Urkel to realize he can never impress Laura by being a hero who saves the day.

With Rachel's help, Harriette wins a radio call-in contest and nabs the grand prize: a new car. But just who deserves the car more becomes a major sore point between the sisters, leading to a huge argument. Carl isn't there to intervene; the acrophobic Winslow - the butt of jokes at the precinct when he was unable to foil a robbery because of his fear of heights - finds himself in the worst possible situation, thanks to Urkel: high in the sky in a hot-air balloon, with no way to get down. However, Carl is able to save the day when Urkel nearly falls out of the balloon.

Rachel tells Richie and Judy stories about Carl and Eddie to teach a lesson about taking credit. Carl and Lt. Murtaugh are involved in an operative to uncover a smuggling ring. Even though Murtaugh nearly blows the undercover scheme, Carl is able to take the criminals into custody and gives his partner credit for setting up the sting. Meanwhile, Eddie struggles with a writing assignment in class and turns to Urkel for help. Urkel ghost writes a really great story and Eddie is ready to take the credit ... until he is asked to produce more stories.

Carl is hoping to get a promotion, but it may ride on Lt. Murtaugh's influence - and his ability to get the smart-mouthed lieutenant a date with a less-than-willing Rachel, who is already fed up with his borderline sexual harassment.

Carl has to stay on a treadmill that is rigged with a bomb.

Laura wins the female lead role in the school production of "Romeo and Juliet," and looks forward to the kissing scene with her Romeo, Daniel Wallace. Then Daniel falls ill and the understudy - who else but Urkel - takes his place. Thanks to Urkel's clumsiness and being himself, the play turns out to be a disaster.

Urkel and Laura are in the same boat as equipment manager for the basketball team and underclassman cheerleader, respectively. Urkel's talents on the court seem to go unnoticed by the coach ... until he is the only available team member left who hasn't become injured or fouled out; he winds up being instrumental in his team's winning rally. In Laura's case, she has to deal with snotty team captain Cassie Lynn, who insists on running the squad her way, even though her clichéd cheers aren't going over too well. Laura's cheers, however, really spark some crowd enthusiasm.

A street gang named the Dragons begin causing trouble at Rachel's Place, breaking things and sexually harassing employees; Carl arrives just in time to chase them out. That night, after closing time, the gang breaks in and heavily vandalizes the teen hangout. Everyone's anger grows when a bruised and bloodied Eddie arrives, announcing he was ambushed by the Dragons' gang members. Carl wants to take matters into his own hands, but Urkel reminds him that if he were to do that, he'd only destroy much more than his career. Urkel eventually agrees to go undercover as a prospective gang member and trick them into confessing their recent activities.

Urkel tutors a pretty girl named Vonda, a girl whom Eddie is looking forward to asking out. When she passes a test, Vonda comes on to the nerd, prompting him to conclude she has an easy reputation. Urkel helps set her straight, which is good for her ... but definitely not what Eddie was hoping for. Meanwhile, Carl is the butt of Lt. Murtaugh's jokes when he is asked to wear drag for a drug sting.

Urkel joins in on Carl's poker night, only for Lt. Murtaugh to take quick advantage and clean out the nerd. Eventually, Urkel gets his revenge by cleaning out the hustling, loud-mouthed lieutenant. Meanwhile, Harriette offers to help understaffed Rachel at Rachel's Place, but Rachel takes her sister's well-meant suggestions the wrong way.

Eddie doesn't study for a chemistry test and convinces Urkel to help him cheat (by pretending to have a cold). When Urkel really does have a cold, he is caught giving Eddie the answers and - when he keeps mum about who he was helping to cheat - is threatened with expulsion. Meanwhile, Carl becomes the laughingstock of the precinct when he literally sleeps through a house burglary (thanks to the crooks using sleeping gas). One night, when Eddie and Urkel were confessing their misdeed to Carl, they fall asleep again - only for Harriette and Rachel to nab the burglars in the act. Eddie and Urkel eventually have to re-take the test.

Harriette's troubled cousin, Clarence, comes to live with the Winslows until he can straighten out. Instead of deciding to fly right, Clarence becomes a bad influence on Eddie and gets him and Urkel into big trouble when they are caught with a bunch of pretty girls ... and a stolen car! Eddie confesses and realizes he shouldn't have listened to Clarence, whom Harriette quickly becomes fed up with and kicks out of the house.

Laura had enough problems trying to give Urkel the brush-off. Now, Waldo is the one who's head over heels in love with the Winslow girl ... especially after she tried to encourage down-on-his-luck Waldo.

Urkel is invited to stay with the Winslows when the nerd's parents go out of town ... and quickly causes plenty of chaos. He drives Laura's study partner away, convinces Richie to get into a fight with a preschool bully, and accidentally vacuums up Lt. Murtaugh's fish that Carl was baby-sitting.

A reprogrammed Urkelbot is sent to fight crime, and proves to be instrumental in foiling a serial convenience store robber. Meanwhile, the women find (to their horror) that a new shampoo has caused them to go bald.

Urkel composes a detective yarn about 1940s-era gumshoe Johnny Danger, who is sent to protect supper club owner (and assassin target) Rachel.

Urkel and Carl are forced to share the same hospital room, when the nerd suffers from appendicitis and the cop wounded while trying to foil a robbery.