The Simpsons Episode 12.13 Day of the Jackanapes

Krusty the Clown decides to retire after his show is eclipsed by the popular game show "Me Wantee." During a farewell interview with Kent Brockman, the funnyman reveals that he accidentally erased the tapes of his first ten years on the air. When news of his erasure from the Krusty canon reaches Sideshow Bob in prison, Bob vows to get revenge. Upon his release from prison, he comes up with the ultimate revenge plot: hypnotize Bart Simpson and program him to kill Krusty during his farewell show. The night of theshow, all of Springfield turns up to honor the retiring clown, including Bart, who has been strapped with explosives. Bob programmed Bart to blow Krusty up when he hears a special trigger phrase. However, at the last minute, Bob has second thoughts and attempts to interrupt his violent plan.