Malcolm finds his life as the middle brother in an eccentric family made even more difficult by his being placed in a class for gifted students at school.
When Francis is left in charge of his brothers, mayhem ensues, and Malcolm gets hurt, requiring hospitalization.
Lois has a showdown with the other mothers at a Krelboyne picnic, while Reese preys upon Malcolm's gifted classmates.
Malcolm and his brothers build the ultimate stealth weapon, while Hal and Lois battle a speeding car that terrorizes their neighborhood.
Malcolm talks the family out of going to a relative's funeral, so he can go on his first date instead.
