Will Jennings

After his oldest brother is sent to military camp, Malcolm, a child genius, is left in the middle between his two other brothers.

Lois forces Malcolm to befriend the meanest old lady on the block; Dewey begins carrying a purse to school.

Lois has a showdown with the other mothers at a Krelboyne picnic, while Reese preys upon Malcolm's gifted classmates.

Following Malcolm's advice, Reese joins the cheerleading squad to impress the object of his affection.

Exasperated with nonstop complaints, Lois throws in the towel, which leads to the rapid breakdown of family life.

When Francis is left in charge of his brothers, mayhem ensues, and Malcolm gets hurt, requiring hospitalization.