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: A two-part finale where Reese runs away to enlist after a heartbreak, and Hal faces potential jail time for his company’s legal troubles. Main Cast & Guest Stars Frankie Muniz Bryan Cranston Jane Kaczmarek Justin Berfield Erik Per Sullivan Christopher Masterson Notable Guest Cloris Leachman as Grandma Ida Notable Guest David Cassidy as Boone Vincent
: The family discovers their neighbors have been throwing a celebratory party every year specifically because the Wilkerson family is away on vacation. Malcolm in The Middle - Season 5
: Malcolm tries to prevent Dewey from being placed in the high-stress Krelboyne class, but Dewey's plan to fail the IQ test backfires, landing him in a class for emotionally disturbed students. : A two-part finale where Reese runs away
: 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. : Reese attempts to live on his own
: 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.
: 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.
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.