Walt gives Jimmy a BB gun for his birthday, prompting an all-out war between him and Sean, which ends up with Walt in the hospital, shot in the rump.

Sean has some explaining to do when Lily’s devastated to discover that she was born out of wedlock.

After the family car goes missing one night, the Finnertys find themselves at an impasse: Sean is in mourning over the loss, while Claudia hopes to gain from a slightly inflated insurance claim. But when the battered remains of the car are towed to the house a few days later, it becomes clear that Lily has been covering her tracks about an ill-fated joyride -- and the reason why her parents have to buy the missing parts from Eddie's maniacal mechanic.

Lily's compulsive credit-card usage sinks Sean's plans to take Jimmy and his friends to a pricey waterpark; Eddie refuses to open up to his family about the contents of his mysterious locked box. (TV Guide)

Sean accepts a challenge from his obnoxious neighbor, Mr. O'Keefe, for a boxing match. But he has second thoughts when he discovers Eddie's tried to fix the fight. Meanwhile, Claudia becomes enraged when she learns about a rumour that she's had breast enhancement surgery.

Things get tense at the bar when Sean hires his high school fantasy girl as the bartender. And Lily freaks out when she tells Dean she loves him at a concert and can't hear his reponse.

From TV Guide: Following his school's drug-awareness day, Henry thinks his family is on drugs and stages an intervention for Sean after he finds a suspicious plant growing in the yard.

Lily resents her ex-boyfriend's ability to move on so quickly after she dumped him; Eddie's stand-up routine flops until he incorporates material from Claudia and Sean's personal life.

Eddie persuades Sean to help him break into his ex-girlfriend's apartment to steal embarrassing photographs.

Sean disciplines one of Henry's bratty friends; Lily asks Brad to choose between her and his geeky friends; Eddie uses a Jewish online dating service.

Sean's old friend Dave is in town, a children's performer who goes under the name ""J.J. Bodybuddy"". He lets Dave stay at his house...but it isn't entirely altruistic. He's promised the school that he can get J.J. Bodybuddy to do a show for the kids. The problem is, Dave--a recovered alcoholic who hasn't touched the stuff in ten years--gets too drunk to do the gig, and Sean has to put on the Bodybuddy leotard hismelf. Meanwhile, Lily is jealous of the new baby, and is letting her feelings be known vociferously.