The family dynamics shift with the arrival of baby Jamie. Malcolm navigates teenage life, including romantic interests and school pressures, while Hal and Lois juggle parenting their growing brood.

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Malcolm in the Middle Season 4 released on November 3, 2002.

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S04E01 Aired November 03, 2002

Zoo

Malcolm, whose frenetic home life is a kind of zoo, begins the fourth season by accompanying his family to the real thing. A visit to the zoo offers close encounters with creatures great and small. But Hal wishes he could have passed on an encounter with Lois's former beau, who lectures on rain-forest animals. Elsewhere, Reese butts heads with a goat; and Malcolm and Dewey take a tumble into a tiger den. Another storyline checks in on ne'er-do-well Francis, now the unlikely foreman of a dude ranch owned by a cheery German businessman.

S04E02 Aired November 10, 2002

Humilithon

High school's first day vexes Malcolm, who acquires an unfortunate nickname; and Hal, a parental "volunteer" running afoul of authority.

S04E03 Aired November 17, 2002

Family Reunion

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.

S04E04 Aired November 24, 2002

Stupid Girl

Acting dumb like Reese eases Malcolm's stress and lands him a date with the new light of his life, an attractive girl who's really a dim bulb.

S04E05 Aired December 01, 2002

Forwards Backwards

Brotherly love is lost on Malcolm and Reese, now out to sabotage his sibling's birthday in devilish strikes met with crafty counterattacks.

S04E06 Aired December 15, 2002

Forbidden Girlfriend

The new light of Malcolm's life is a vivacious, rebellious girl (Reagan Dale Neis) who defies her overbearing dad---who terrifies Malcolm.

S04E07 Aired January 05, 2003

Malcolm Holds His Tongue

After joining the basketball team at school, Malcolm soon finds himself under the coach's skin due to his constant complaining, which eventually gets him kicked off the team. Determined to put an end to his horrible habit of talking before he thinks, Malcolm starts "holding his tongue" which solves all the problems with his coach, girlfriend, and parents, but it ends up causing more stress than before. Meanwhile, Hal takes up speed walking and is desperate to be the best while Reese gets Craig to take him and Allison to a concert and almost ruins his date.

S04E08 Aired January 12, 2003

Boys at Ranch

Typically, the boys run amok at Francis's dude ranch; atypically, he disciplines them, setting the stage for their clever retaliation.

S04E09 Aired February 02, 2003

Grandma Sues

Cloris Leachman returns in her Emmy-nominated role as the spiteful and irascible Grandma Ida. She's even nastier than usual (if that's possible) because of a tumble down the front steps that resulted in a broken collarbone, prompting her to sue her daughter and son-in-law for pain and suffering. And there's more momentous news on the home front: Lois is pregnant. So she pleads with Ida to reconsider her lawsuit: "We're already stretched to the limit financially as it is. Obviously, a new baby is going to make things even harder on us." "Yes, yes, of course," Ida concurs. "You should settle."

S04E10 Aired February 09, 2003

If Boys Were Girls

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.

S04E11 Aired March 02, 2003

Long Drive

A sex lecture from Lois rattles Malcolm; a ranch calamity unnerves Francis; disharmony among Hal's music group is a prelude to their concert. Also, a day in jail tests a defiant Reese, who faces a "Scared Straight" encounter.

S04E12 Aired March 09, 2003

Kicked Out

After Lois is out of town, Malcolm and Hal got into a fight leading Malcolm to get expelled from his house. Malcolm lives with his girlfriend in her attic, as Hal put signs for "Missing Malcolm."

S04E13 Aired March 16, 2003

Stereo Store

Jessica, a sly, 16-year-old sitter outfoxes the boys while Lois is away and Hal's busy with a second job as a whiz of a salesman.

S04E14 Aired March 30, 2003

Hal's Friend

Malcolm tries to emancipate Dabney from his overbearing mother while Hal invites his ne'er-do-well old buddy to the house. At the ranch, Francis is forced to share a room with Otto.

S04E15 Aired April 06, 2003

Garage Sale

A garage sale that's entrusted to Reese (yikes!) yields treasures near and dear, like Hal's old radio transmitter, which he makes operational. And a PC dating back to 1976 that Malcolm plans to sell to Craig for $1300.

S04E16 Aired April 13, 2003

Academic Octathalon

An academic competition faces the Krelboynes in an event Malcolm derides. Especially when he learns his teacher has a cheating plan. Also: a commitment to a formal dance ruffles Reese, who's now trying to ditch his date.

S04E17 Aired April 20, 2003

Clip Show #2

Clips from past episodes are interwoven with the current squabbling of Hal and Lois, who set out to draw up a will and wind up at odds over their legacies and their kids. As Hal tells Lois, "We are not equipped to deal with these issues."

S04E18 Aired April 27, 2003

Reese's Party

When Hal and Lois go out of town for a "last chance" getaway before the baby comes, Reese has a big bash that gets out of hand. College-age thugs show up, cancel the party and set up a drug-making operation in the garage. All Reese and Malcolm can do is knuckle under. The good news is, Dewey's not around. The bad news is, his baby sitter is Lois's annoying co-worker Craig (David Anthony Higgins). Meanwhile, Hal and his very pregnant wife are off at a romantic retreat---feuding.

S04E19 Aired May 04, 2003

Future Malcolm

Leonard (Jason Alexander), 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.

S04E20 Aired May 11, 2003

Baby (Part 1)

Hal and the boys are at a bridal expo, leaving a very pregnant Lois at home with Francis. They get two surprises: an unexpected visit from Grandma Ida (guest star Cloris Leachman) and Lois' water breaking.

S04E21 Aired May 18, 2003

Baby (Part 2)

While Lois is in labor, the house is hectic, and Hal, desperate to get home, has crashed the car on the way out of the expo.

S04E22 Aired May 18, 2003

Day Care

With the arrival of their fifth child, Lois and Hal search for a "creative" daycare solution.