Series Finale: In the series finale, Malcolm struggles with his valedictorian speech, Hal finds out that the family may not have enough money to send Malcolm to college. The boys decide that Jamie should have the childhood they never got, one free of threats. As such, they destroy their "nuclear option," evidence of the worst thing they ever did: fake an X-ray of Lois having cancer to sneak away with bad report cards, and a way to destroy each other if someone had nothing to lose. Francis finds the 9 to 5 job of his dreams but won't let Lois know, Reese tries to be a permanent janitor, enlisting Ida's help, and three months later, Lois is pregnant yet again. When Lois denies him the chance of a lifetime, Malcolm discovers that Lois and Hal plan for him to become president.

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