Malcolm sleeps over at Stevie's house and, appalled at his over-protected lifestyle, persuades him to sneak out to a strange, late-night escapade. Francis deals with hazing at military school. Reese tries to prove he's man enough to watch a scary movie.

Roller-skating lessons from Hal bug Malcolm, who rebels against dad's discipline while mom agonizes in bed from a backache she blames on Reese. Francis avoids his squad's survival weekend.

When the family goes to a water park for a day, Dewey is left home with an elderly, stern babysitter. Francis is hustled at pocket billiards by his military-school commandant.

Crummy gifts rile birthday gal Lois, who suddenly splits from home, leaving confusion, anxiety and desperation in her wake.

Malcolm's humiliation as a Krelboyne drives him crazy, so he fakes his way into seeing the school's shrink, with whom the con continues.

New neighbors, who turn out to be even more awful than Malcolm's family, move in next door; the Marlin Academy cadets prepare for a visit from Oliver North.

Hal feels like his job is a piece of c* after going to Dewey's class for parent job day. So he decides to take a "kidney failure" weeks off. While Francis is forced to work at the lucky aid over spring break.

Malcolm and the Krelboynes tutor Reese, and uncover the real reason behind his failing grades.

Lois forbids the boys to ride a motorbike they found, but Reese disobeys and breaks a leg.

Malcolm, Dewey, Stevie, and Reese hide out at a traveling carnival after hours and run afoul of a determined security guard and several members of the freak show.

Francis has to stay a couple of days in a small county jail and enjoys it more then he expected. Malcolm finds himself with a girlfriend, which add to his usual social anxiety. Dewey makes friend with a new kid in the area, helping the kid's mother to compose Dewey's dream birthday party for his new friend.

Poker showdowns with Abe give Hal a flush; dance lessons turn Lois awhirl; an Alaskan blizzard entraps and rattles Francis. (TV Guide)

The return of the smart and sassy Cynthia rattles Malcolm, who's astonished by her physical maturation. And so is drooling Reese.

Lois gets jury duty and Hal tries to figure out what case she's working on. Meanwhile, Malcolm and Reese saw Stevie's mom naked and brag about it, they also take Dewey to the sewers and get lost.

New monkey business occupies Reese, now a self-appointed law enforcer; a capuchin monkey has it in for Lois's co-worker, Craig.

Christopher Lloyd adds to his gallery of eccentric characters, playing Hal's quirky, cranky and very wealthy father, Walter, in this rollicking episode. The occasion is a birthday celebration for the old man, but the snooty female in-laws seem more interested in offending Lois. Their shabby behavior initially goes unnoticed by Hal, who's desperately trying to bond with his self-centered dad; and by Dewey and Reese, who seek some of Grampa's dough by currying favor with him. But when Lois is reduced to tears after being excluded from a group photo, the family rallies to her side with an all-out counterattack that turns the party into pandemonium.

After being rattled by a battle among the boys, a pregnant Lois ponders the consequences of raising another brawling kid. So she fantasizes that her unruly sons have morphed into well-behaved young daughters. Malcolm becomes Mallory, Reese is transformed into Renee and Dewey turns into Daisy.

Leonard, a cynical, genius chess player with no friends or job, makes Malcolm think he could grow into a similar adulthood. Determined to prevent this undesirable fate, Malcolm tries to help Leonard change his life by lining him up for a job interview with the obnoxious Craig. Meanwhile, Francis finds employ as a nude model and begins to delight in the exposure.

Malcolm is convinced to play Softball by Lois and ends up doing very badly at it due to Lois's hold on him. Meanwhile, Francis tries to pick fights with Lois, Reese tries to break Francis's record of collecting toilet seats from a local junkyard, and Hal accidentally applies to become a member of the CIA.