Jeff thinks he's partly paid off a debt to his father-in-law. Think again. A program for his gifted son is going to cost plenty.

One of Karen's co-workers flirts with Jeff and he feels guilty until Karen's high school flame comes back to town and his jealousy takes over. Walt torments Russ after he gets stuck in a dark vent.

Having never learned to swim himself, Jeff believes Matt should, even though he doesn't want to.

Kathy's dad Elliot tells Jeff a big secret about his past while on a fishing trip; Russ and Walt happily tackle a repair job at a lingerie store.

The director of Matt's gifted program once accused Jeff of shoddy workmanship; a video of Karen giving birth gets onto the school's tape exchange.

Jeff and Elliot look for a glass of milk -- straight from the cow -- when they team up for a Halloween scavenger hunt.

Jeff's not an idiot, it just looks that way when he looks after Elliot's pampered pooch and restless shut-in Raymond, for whom Karen is the usual caretaker.

The Foxworthys appear on ""America's Funniest Home Videos.""

When Jeff fails to set up the family's annual Christmas portrait, he gets unwitting help from country singer Travis Tritt, whose tour-bus heater he repairs.

Jeff tries to remain neutral in the marital battle between Karen's sister Gayle and her husband Dennis, but Gayle uses Jeff's ambiguous advice and drops a bombshell.

With Jeff's help, Gayle brings her things down from up north, while the heating-and-air business continues to head south for Jeff.

Jeff's younger brother Wayne arrives with big ideas about how to save the business, but Jeff is eluctant to become partners with his unpredictable sibling.

Without consulting Jeff, Wayne hires his flame, a Cajun spitfire, as the shop's receptionist, and Jeff flares at the news.

Wayne fears someone from his past is out for revenge; and Elliot is afraid there's no limit to Lois's suddenly insatiable amorous desires.

Exposure to chicken pox means Matt can't be around pregnant Karen for a few days, so he and Jeff moves in with Wayne, who helps expose his nephew to the Foxworthy family's wild side.

Wayne's success as a stand-up comic inspires Jeff to shoot from the lip to prove he's the funnier Foxworthy.

Karen finally delivers her baby. Wayne and DeeDee decide to get married.