At the crime scene, Bart and Lisa recall the robber read a magazine and used a microwave oven; Krusty is illiterate and has an artificial pacemaker which requires him to avoid microwave radiation. When Bart and Lisa visit Sideshow Bob to learn whether Krusty had any enemies, he gives them tickets to his show. During the live broadcast, Bart is invited on stage with Bob, who dismisses Bart's points about the microwave and magazine; Bob claims that Krusty never listened to doctors and that you can enjoy the cartoons in a magazine without being able to read.