Season 5 of Malcolm in the Middle , which originally aired from November 2003 to May 2004, is defined by the family's transition as the boys grow into their teenage years and adjust to the newest addition, baby Jamie.
: Following his birth at the end of Season 4, Jamie becomes a central figure, leading to new dynamics like "baby gambling" among local fathers and Lois struggling to maintain her usual level of control. Malcolm in The Middle - Season 5
: Malcolm continues to assert himself in high school, dealing with censorship in the school newsletter and navigating complex social circles, such as "dating" a girl's entire intellectual family. Season 5 of Malcolm in the Middle ,
: The family travels to Las Vegas after Hal has a prophetic dream about a jackpot. Dewey and Reese enter an obese rabbit into a competition while Lois meets her favorite singer, Boone Vincent. : The family travels to Las Vegas after
: Directed by Bryan Cranston , this episode features Malcolm and Stevie needing the "unintelligent" Reese to help solve a complex scientific enzyme problem.
: Reese attempts to live on his own in an apartment and eventually makes a massive life change by enlisting in the Army during the season finale.