After his oldest brother is sent to military camp, Malcolm, a child genius, is left in the middle between his two other brothers.
The boys cause a steam cleaner to explode, causing Lois to lose her job at the pharmacy.
Exasperated with nonstop complaints, Lois throws in the towel, which leads to the rapid breakdown of family life.
Keith gets revenge on David and his brunch pals during a game of paintball; Claire tires of being Oliver's assistant.
When Jack works instead of taking his son to a basketball tournament, he learns from Will that he missed his son's first kiss with a girl.