Leo and George enrol in a baby care class in an attempt to ready themselves for grandfatherhood, but their first assignment leaves them sifting for ways to reverse their troubles when their ""baby"" — a flour sack — has an accident. Leo wants to prove to Casey that she can count on him to babysit, so he enrolls himself in a baby care class, dragging George along as well. The two men are by far the most unusual couple in the class, and their first assignment is to care for a 10 pound sack of flour as though it were their baby. Unfortunately, the ""baby"" accidentally rolls off the roof of Grandpa George's car, and he and Leo then concoct a scheme to get a new ""baby,"" hoping no one will know the difference.

Leo is a steady, two-carton-a-week smoker until George demands that he quit. While trying to get Leo to stop, however, George picks up the habit again, after a 15-year hiatus. Even George's doctor can't convince him to give up. Finally, armed only with their willpower and crossword puzzles, George and Leo decide to hole up and go cold turkey.

Ted and Casey hire a nanny to care for their new baby, Alice, who seems to be the perfect person to care for the new baby. She's a registered pediatric nurse, warm, smart and loving. The problem is she's a little too loving when it comes to Ted. When Alice, mortified by her crush, decides to quit, it's up to George to figure out a way to keep her on the island and away from Ted.

When George begins his new job teaching a business class at the local college, he discovers that his housekeeper, Margie, is one of his students. Then, George's new boss, Dean Shirley Martin, jumps to the conclusion that George and Margie are having an affair and fires him the first day for sexual harassment. George is mortified when Leo, Casey and Ted throw him a surprise party to celebrate his new career. Meanwhile, Alice tries to find a roommate and ends up with a male underwear model.