Homercule Poisson

Homercule Poisson is a famous detective from Belgium in a story by Lisa

History
When Homer was banned at the Springfield Monorail made Bart him dressing him as Homercule Poisson so he could ride the train. When he was on the train was Sideshow Bob murded and he had to solve the mystery.

Behind the Laughter

 * Homercule Poisson is a pun on.