Jimmy’s science project is late, because his parents made him go with them to a Ramones’ concert. When Sean pleads Jimmy’s case with the principal, he only succeeds in getting Jimmy thrown out of school.

Lily's trip to an amusement park with a group of her friends backfires when she calls Sean to pick her up. He doesn't like what he sees, and when he realizes HE was the one called because everyone thought he would go easy on them, he proceeds to get them all in trouble by telling their parents.

Sean (Donal Logue) tries to disguise the fact that he cut Henry's (Jake Burbage) hair himself instead of taking him to a barber shop.

Sean exploits a nun's foulmouthed slip of the tongue to get Claudia and the kids everything they've ever wanted from St. Finnian's.

Claudia learns the results of her pregnancy test and Sean celebrates the news with a major purchase: a bar that Eddie plans to burn down for the insurance money. Meanwhile, Lilly and Brad try their luck at getting liquored-up; and Henry develops a craving for a different kind of watering-hole delicacy.

For the second time, Lily has failed her behind-the-wheel exam. But this time it's not her fault, it's Sean's, who went out of her way to sabotage her driving test by teaching her rediculous driving tips, such as the all-important ""W-turn."" In other events, Claudia is having a devil of a time keeping Henry and Jimmy from playing a violent video game condemned by Sister Helen -- but she winds up addicted to it herself.

After Eddie buys an electric car to impress a girl, Sean unwisely gives Eddie a loan without telling Claudia, which results in her college enrollment check bouncing. Meanwhile, Brad discovers a tatoo with Dean's name, but Lily's plea for her parents to pay for her tattoo removal goes ignored.

Now that Eddie is spending all of his free time with Faye, lonely Sean finds every possible thing wrong with her, including the way she parks her car, which he ""accidentally"" smashes into. Meanwhile, Lily's attempt to make Brad jealous by dating Mocha Joey backfires when Brad points out that Lily and Mocha Joey have nothing in common; and Claudia gets upset when she finds out that Sean has told everyone that she is pregnant.

In the series finale, Claudia and Sean miss Lily's graduation (thus spoiling Lily's senior-prank plan) when Claudia goes into labor. Meanwhile, the Finnerty boys learn that Walt has a girlfriend... his cleaning lady!