When Lois finds her red anniversary dress burnt and in the toilet, she immediately suspects Reese, Dewey and Malcolm of foul play, and chases them all over the house to try and make them fess up, while Hal waits all night at the restaurant alone.

Because of Dewey always leaving food in the crawlspace under the house, the whole family is forced to live in a trailer owned by Lois' coworker, Craig, while their house is being fumigated. However, Malcolm ends up spending more time at the home of an upper-middle-class family who has hired him as their babysitter, but he learns that they were secretly videotaping him. He later blackmails the family to leave him alone and quits the job, also revealing a horrible secret about the family's wife. Meanwhile at the academy, Francis finds the corpse of a former janitor in the basement of the military school, who was missing for 16 years, and teams up with his friends to give the forgotten custodian a proper burial by sending him down the lake in a burned boat and performing a burial at sea, which turns into a disaster.

Waiting in Lucky Aide for Lois to end her shift, Reese and Malcolm cause trouble, which leaves Dewey unobserved and able to nick something expensive from the store. Lois tries to make a point about "doing the right thing" and loses her job in the process. It also leaves the family with less income, bad food and Malcolm stressed out, especially because he already is in emotional despair over Julie Houlerman. Malcolm gets caught in an awkward social situation and Lois struggles between standing up to the man and providing for her family. Meanwhile Francis gets a break from the academy as honor guard for a beauty pageant. Every cadets dream come true?

Lois takes off to visit Francis at the academy, which might make his recent appendectomy just a little more painful. Without Lois, Hal devolves to his former bad boy personality, which turns the robot Malcolm builds with his Krelboyne colleagues into a much more destructive power than expected.

When Lois gives the boys $10 each to buy her a present, they decide to get something for themselves, which causes her to have grief. When Hal also forgets her birthday, Lois decides that is enough, so she escapes until the family finally decides that they need her. Meanwhile, Francis brings home a beautiful African woman.

The family is on a weekend-vacation in an native American casino. Francis uses this opportunity to go on vacation himself, by sneaking into his former home, but he is not the only one with that idea. While Hal, Reese and Malcolm get lost in the desert, Lois and Dewey enjoy a day of relaxation.

The night shift at Lucky Aide is held hostage by two robbers, since Craig does not want to give up the combination for the store's safe. Francis tries to help a heartbroken friend at the academy, while Hal and the boys fight nature at home.

Hal feels like his job is a piece of crap 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.

When Lois is arrested for having 16 unpaid parking tickets, she makes Francis pay for them and fights the cop in court for falsely accusing her of something she never did.

Francis makes Reese and Malcolm fight each other and suck up to him for wrestling tickets. In the meantime Dewey takes care of Craig's cat Jellybean while he is gone to a comic convention.

In this episode Craig still lives in Lois and Hal's house, because his one had been burnt down. That costs a lot of things on the whole family. Meanwhile, Malcolm and his brothers find a mini-bike in the garbage. At first they argue with each other, but after their mother banned the use of the bike, they join forces against her. At the same time Hal goes to Allabama to visit his son Francis for the Fathers-and-Sons meeting, where he expects some great achievements from his son. But what will happen after all that ?

Reese lands a part time job at Circus Burger, which seems like a good job. Until he meets his supervisor, Francis' dim-witted friend Richie, who, along with his co-worker cohorts, set Reese up as a patsy.

Lois is completely mortified when she is called slovenly at work and is asked to dress up her appearance.

Reese goes on a high-speed car chase during drivers'-ed class.

Upon coming home from school, Dewey adopts a dog named Marshmellow and decides to hold Malcolm and Reese hostage for all the things they did to him while he was growing up.

Craig hires an evil helper monkey. Reese catches a burglar and decides that he would like to try being in law enforcement. Francis and Piama are forced to leave Alaska.

Today is Malcolm's birthday and unfortunately he and Reese are in a long prank war against each other. Meanwhile Francis does battle with a legend about an evil cow at the Grotto Ranch and Hal is forced to enlist Craig Feldspar to help him with a comic book present.

Malcolm is fed up with the fact that every time he complains, something wrong happens. He has recently got kicked off the basketball team and vows not to complain anymore. He receives good results by not complaining - he gets back on the team, negates Lois' anger by not talking back to her, and gains the respect of his girlfriend, Nicki, who shares a kiss with him. Next, Hal decides to be a speed waker and soon gets competitive with a local walker. Meanwhile, Reese wants to take Alison to a concert and the only driver he can find is Craig Feldspar. However, Craig has plans of his own for his two passengers - a hay ride and a bonfire dinner. Alison is fed up and pepper sprays him and threatens to give Reese the same treatment if he doesn't let her go her own way. He's pissed off as Craig plays his ukulele and sings a song from Air Supply.

When Hal kicks Malcolm out of the house for misbehaving, Reese tries to take advantage of Hal's distraction to come up with a truly bad stunt of his own, and Francis takes offense when Otto's musician nephew plays a musical accompaniment to Francis' every move.

The family decides to hold a garage sale to fund repairs of the bedroom wall and Lois puts Reese in charge. Hal finds his old radio-transmitter and starts running a pirate broadcast like he once operated in college.

When Hal and Lois go on a less-than-romantic getaway, Reese throws a party at home, which is crashed by delinquent friends of Francis, who take over the garage and hold the boys hostage.

Malcolm meets a chess-playing bum who could be him in 30 years; Lois can't figure out why she's gaining weight; Dewey attributes his bizarre behavior to obeying requests from the fetus Lois is carrying; Francis objects to Piama posing nude in an art class.

Lois continues with her strenuous labor, as friends and family all panic around her.

The family joins a church in order to take advantage of the free day care; Francis concocts a UFO story to help the dude ranch.

When an exhausted Lois falls asleep, Hal goes out for diapers, only to be branded a shoplifter; three beautiful girls use Malcolm, Reese, and Stevie to embarrass their prom dates; Dewey tells the baby a fantastic tale to keep him from crying.

Lois gets Malcolm a job at the store, exposing Lois's well-kept secret; Hal and some other fathers start betting on babies; and sick of the way his brothers treat him, Dewey travels to the farm to visit Francis.

Hal and the boys enter the season of goodwill in a competitive spirit when the local church starts to undercut them on Christmas tree prices.

Malcolm volunteers for the company's softball team, only to realize that Lois is the coach; Francis sets out to prove he's not lazy; and Hal interviews for a job at a company that might be recruiting secret agents.

Polly begins dating Abe and Craig; Malcolm refuses to believe in the power of Dewey's lucky shirt; the ranch hands make fun of Francis; and Lois takes the kids to a baseball convention.

When Dewey is in danger of joining the Krelboynes, Malcolm interferes with disastrous results. Meanwhile Hal 'discovers' his latest mania when he sees Craig dancing in a family restaurant.

Lois returns to work at the market as a probationary employee and takes offense at the racist advertising standee for malt liquor. She hopes Malcolm will see her point of view but he is resistant and this leads to a battle of wills between the two. Hal is involved in another battle of wills; this one with the garbage man.

Malcolm uses his illegal gambling profits to buy a junk car, which quickly takes over his life; Hal discovers a talent for hair styling; and Lois discovers Craig is having an affair with the boss' wife.

Hal has a hard decision on his hands, one of the neighbors has been in a coma and he has to decide whether or not to keep him on life support or pull the plug. He's always turned to Lois to make decisions for him. After another argument between the nurse and the doctor, he ends up paralyzed from the waist up. Meanwhile, Craig enlists Reese, Malcolm and Dewey to help him fight dirty against a childhood bully, who is indeed his estranged, healthy father.

It's Spring break, and Malcolm is stuck working the graveyard shift with his mom, and Reese inherits a box of caterpillars from a shady pest controller. Malcolm investigates something weird at work.

Malcolm gets promoted to a position promoting the Lucky Aide from atop a pair of stilts; Hal tries to make up for accidentally blowing the household budget on a phone-sex line; Dewey thinks Jamie has found a stash of Lois' jewelry hidden by Francis years ago; and Reese joins multiple drug studies.

Having forgotten to pay the bill for the family's health insurance, Hal tries to protect the boys from all accidents for the weekend; meanwhile, Lois accidentally gets Craig into trouble with their co-workers.

Reese and Malcolm find out that there was a murder in the family's house before they moved in. Hal is highly agitated in fear of ghosts from the murder and Malcolm tries to reason him out of it. Meanwhile Reese and Dewey take Jamie Trick or Treating and make a persistent enemy, whereas Lois is stuck at work because of a shoplifter no one want to take care of.

Reese pretends to be a vegetarian; Hal decides to teach Dewey a lesson about the game of "Life"; and Malcolm talks Craig into standing up to Lois and then regrets it.

Having been denied a very lucrative job in a software company, Malcolm accepts the vision his parents have for him. The first US president that will actually keep in mind the best interests of poor people like his own family.

Hal has a hard decision on his hands, one of the neighbors has been in a coma and he has to decide whether or not to keep him on life support or pull the plug. He's always turned to Lois to make decisions for him. After another argument between the nurse and the doctor, he ends up paralyzed from the waist up. Meanwhile, Craig enlists Reese, Malcolm and Dewey to help him fight dirty against a childhood bully, who is indeed his estranged, healthy father.

The night shift at Lucky Aide is held hostage by two robbers, since Craig does not want to give up the combination for the store's safe. Francis tries to help a heartbroken friend at the academy, while Hal and the boys fight nature at home.

Having forgotten to pay the bill for the family's health insurance, Hal tries to protect the boys from all accidents for the weekend; meanwhile, Lois accidentally gets Craig into trouble with their co-workers.

Craig hires an evil helper monkey. Reese catches a burglar and decides that he would like to try being in law enforcement. Francis and Piama are forced to leave Alaska.

Reese pretends to be a vegetarian; Hal decides to teach Dewey a lesson about the game of "Life"; and Malcolm talks Craig into standing up to Lois and then regrets it.

Today is Malcolm's birthday and unfortunately he and Reese are in a long prank war against each other. Meanwhile Francis does battle with a legend about an evil cow at the Grotto Ranch and Hal is forced to enlist Craig Feldspar to help him with a comic book present.

When Hal and Lois go on a less-than-romantic getaway, Reese throws a party at home, which is crashed by delinquent friends of Francis, who take over the garage and hold the boys hostage.

When Hal kicks Malcolm out of the house for misbehaving, Reese tries to take advantage of Hal's distraction to come up with a truly bad stunt of his own, and Francis takes offense when Otto's musician nephew plays a musical accompaniment to Francis' every move.

Malcolm uses his illegal gambling profits to buy a junk car, which quickly takes over his life; Hal discovers a talent for hair styling; and Lois discovers Craig is having an affair with the boss' wife.

In this episode Craig still lives in Lois and Hal's house, because his one had been burnt down. That costs a lot of things on the whole family. Meanwhile, Malcolm and his brothers find a mini-bike in the garbage. At first they argue with each other, but after their mother banned the use of the bike, they join forces against her. At the same time Hal goes to Allabama to visit his son Francis for the Fathers-and-Sons meeting, where he expects some great achievements from his son. But what will happen after all that ?