Craig's new helper monkey turns vicious; Reese lets the power of authority go to his head; Francis' and his wife face eviction..

Malcolm and the Krelboynes are forced to join the regular student body; Hal itches to knock down Dewey's elaborate domino setup; Francis itches to know what Piama did to get Lavernia to be nice to him.

While Lois is on jury duty, she pushes the other jurors to take their jobs seriously; Hal tries to solve a murder case he thinks Lois is assigned to; Malcolm, Reese, and Dewey get lost in a sewer.

After the family car gets damaged and the boys won't own up to causing the incident, Hal takes them to see a psychiatrist.

While Hal gets into a variety of one-up contests with his poker buddies, Reese sets Stevie up with the daughter of one player, while Malcolm discovers the daughter of another player has a gun in her purse.

Dewey hides a dog from his parents; Hal and Lois try to keep a romantic date, even though both of them are sick; Commandant Spangler finds Francis at the logging camp.

Hal begins coaching Dewey's soccer team...much to Dewey's horror; Malcolm gets unexpected results when he programs his new computer to act out the lives of his family; Reese blackmails neighbor Ed.

After Francis shows up with his new wife, Malcolm, Reese, and Dewey get so fed up with Lois' constant yelling, they run away from home.

Malcolm reveals Cynthia's big secret to Reese; Dewey helps Hal overcome his fear of kites; a neighbor makes amends to Lois; Francis becomes enchanted with a totem pole.

Reese gets into trouble during his very first driving lesson; Malcolm helps Craig install a new stereo system; Francis barters a chain of favors to pay off a debt.

As the picnic continues, Hal can't bring himself to admit his real identity to his boss, Malcolm further humiliates himself, and Reese bonds with his scavenger hunt partner.

As the picnic continues, Hal can't bring himself to admit his real identity to his boss, Malcolm further humiliates himself, and Reese bonds with his scavenger hunt partner.

Lois gets dolled up after a scathing customer review; the boys take on Hal at basketball; Francis becomes a rat catcher.

Reese is accused of stealing at his new job; Dewey tries to convince his parents he can keep a goldfish alive; Malcolm chafes when a super-genius joins his class.

Hal accuses Abe of cheating him at poker; Francis weathers a storm at the logging camp; Reese and Lois attend a dance class.

Lois tries to get the boys to behave until Christmas by holding their presents hostage; Francis spends Christmas with his mean-spirited grandmother.

Hal sweats out a biopsy on a lump found during a medical checkup; Dewey babysits the class hamster; Lavernia challenges Francis to a fight at the logging camp.

Malcolm and his brothers mine personal profit from some church charity work; Francis gets a taste of life in a logging camp.

Malcolm gets his first official girlfriend; Dewey makes a non-imaginary friend; Francis takes refuge with a mad bomber in a remote Canadian cabin.

Lois joins a book club; Hal worries about getting the boys to behave while Lois is out; Francis hitchhikes through Canada with a trucker who vows to test Francis' limits.

Malcolm and the Krelboynes do battle with a tough new teacher; Francis tries to get Lois to talk to him after his self-emancipation.

Malcolm and Stevie's families vacation together on a houseboat; Francis decides to quit school and move to Alaska.