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The family attends the counterculture Burning Man festival in the desert.
When Hal forgets to pay the family's health insurance, the company will not reinstate it until Monday, so he panics and locks the boys in their room to keep them from getting hurt.
When Hal catches Dewey smoking, he makes a deal with him that he will stop drinking coffee if Dewey quits smoking.
Reese and Malcolm try to perform the ultimate Halloween prank.
When Jessica goes through some family troubles, Lois agrees to let her stay at the house, making the boys crazy.
When Malcolm gets paired with a dimwitted beauty as his chemistry partner, he thinks it's a recipe for disaster, but when she reveals her feelings for him, sparks fly. They agree to keep .. show full overview
Francis decides to surprise the family by coming home, and the power goes out in the house. Meanwhile, it's Lois who's in the dark when Hal decides to cancel their anniversary dinner in .. show full overview
When Lois finds renewed energy with orthotic inserts for her shoes, Hal fears she will not look to him for support anymore and plots to destroy the inserts. A former female army buddy .. show full overview
Lois thinks the new babysitter she found for Jamie is perfect... until she starts driving Lois crazy. Meanwhile, Reese starts getting picked on by the teacher when he and Malcolm are in the same class. However, Malcolm decides to defend him.
Malcolm receives a check for $10,000. After Hal and Lois find out, they decide to keep the money and spend it on something for themselves. However, when Dewey overhears this, he wants to .. show full overview
Lois, Hal, and Dewey go out of town for a piano competition, so they get Ida to watch over Malcolm and Reese while they're gone. Since Ida thinks Reese needs to become a man, she comes .. show full overview
A broke Francis gets talked into getting a real job by Dewey, but one of Francis' rocker friends decides to offer him the position of tour manager of his band instead. Back home, Hal .. show full overview
Lois discovers she has mono after a visit to the doctor. She then ends up giving it to Malcolm after her maternal instincts begin. As a result, both Lois and Malcolm are forced to spend .. show full overview
Hal learns that his father has passed away, but sheds no tears and passes it off as nothing since he never knew him. So, to make sure nothing like that happens again, he lets the boys do .. show full overview
Francis receives a visit from Lois and Hal to celebrate his one-year anniversary of sobriety. However, when they attend one of his A.A. meetings, it's revealed that it was Lois who .. show full overview
When four popular high school girls play an evil prank on Reese by pretending he has a secret admirer and then dropping a pig off at his front door, Lois comes to his rescue. She plots .. show full overview
Hal's friend Trey tells him to come to his dental office when he looses a tooth during a poker game, but their friendship becomes in jeopardy when Hal's faced with a $2,000 bill and .. show full overview
Malcolm joins a local dance class to impress a girl, but when she loses her footing, he realizes that to win the competition he'll need a partner who can step it up. Dick, a rival .. show full overview
When Stevie goes to the hospital, Malcolm tries making up every excuse he can think of to not go because he can't face the truth about his illness. Meanwhile, back home, Hal gets highly .. show full overview
Reese meets a cute vegetarian named Carrie when he goes back to work at the meat plant. At first, he goes along with her political talk, but she catches him with a pork chop. So, to get .. show full overview
For the senior prom, Reese gets paid to take Janine, a studious girl in class, but only after she gives him a makeover and sends him to finishing school, while Malcolm aligns with the .. show full overview
Malcolm struggles with his speech when he's elected valedictorian of his graduating class at school. However, Lois refuses to listen to any of his complaints and reveals that she wants .. show full overview
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