In 2000, the world was introduced to the crew at the heart of Malcolm in the Middle. Led by a young Frankie Muniz as the show’s namesake, viewers watched the hilarious hijinks of this dysfunctional family unfold episode after episode—and it feels like just yesterday we were singing along to that iconic theme song! The series, which aired more than 150 episodes over seven seasons, revolved around Malcolm (Frankie Muniz), the intelligent middle child of a wildly eccentric, yet loving family.