When his oldest brother is sent to military camp, a boy genius is the middle child between two other brothers.

When Lois finds her new dress burned and left in the toilet, she tries to get a confession from one of the boys.

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

Malcolm (Frankie Muniz) is guilt-ridden after beating up a school bully who turns out to be just a 7-year-old brat. With Jane Kaczmarek and Christopher Kennedy Masterson.

Malcolm enjoys baby-sitting for a normal family until he finds out he has been under camera surveillance.

During a sleepover, Malcolm sneaks Stevie out of the Kenarin house and loses his wheelchair; Francis deals with hazing at military school; and Reese tries to prove he's man enough to watch a scary movie.