This image released by AMC shows Walter White, played by Bryan Cranston, teaching chemistry class in a scene from the pilot episode of "Breaking Bad." The series finale of the popular drama series airs on Sunday, Sept. AP Photo/AMC, Doug Hyun This image released by AMC shows Bryan Cranston as Walter White laundering money in the pilot episode of "Breaking Bad." This image released by AMC shows Walter White, played by Bryan Cranston, next to the Winnebago he uses as a mobile meth lab in the pilot episode of "Breaking Bad." This image released by AMC shows Walter White, played by Bryan Cranston, and his wfe Skyler White, played by Anna Gunn, during Walt's chemotherapy treatment during the first season of "Breaking Bad." This image released by AMC shows Walter White, played by Bryan Cranston, wearing a Bollman 1940"s pork pie hat in a scene from the second season of "Breaking Bad." For five seasons AMC has kept audiences hooked on the evolution of Walter White and the dark world he embraced in "Breaking Bad." As the chemistry-teacher-turned-drug-lord, Bryan Cranston and the rest of the show's cast have earned their share of Emmys while the show has logged record ratings. As the show's finale airs tonight, here are some images from past episodes: