- "Nobody who's seen his face has lived to tell about it... They say he appears with a smile and he leaves with a smile."
He is an older man with a light brown beard dressed in a clown-like outfit with a top hat.
Mad Pierrot was subjected to numerous, mysterious experiments in a laboratory, resulting in superhuman abilities, including the ability to fly, greatly-enhanced strength and speed, and a personal shield that stops any high kinetic energy object. The results of the experiment were deemed a failure and he was kept in isolation to be quarantined in a hospital where he would be held indefinitely. However, the intense agony caused by the experiments also warped his mind and he regressed into a child-like state. Due to the continued deterioration of his sanity from the memory of the experiments, his mind finally breaks. He slaughtered the scientists and all staff members and escaped from the hospital. He acquired several high tech weapons and set out to kill all high-ranking ISSP officials who were responsible for authorizing the experiments performed on him. He also relentlessly hunted down and killed anyone who catches even a single glimpse of him. As Jet's friend Bob noteed, nobody who has ever seen his face has lived to tell about it.
Spike encountered him in an alley after a night of drinking and playing pool at C'est la Vie. After another merciless slaughter of an official and his bodyguards, Mad Pierrot then spotted Spike and the two had an intense gunfight. Unfortunately, Spike's bullets are repelled by the shield and Pierrot beats him savagely. Pierrot only stops attacking Spike when he hears the meowing of a cat, which reminded him of the scientists' cat which watched him as he underwent the experiments. Pierrot proceeds to maniacally shoot at the cat in terror and Spike, sensing a distraction, takes the opportunity to roll a flammable barrel towards him and shot it, causing it to explode. Pierrot was unhurt by the explosion despite the fact it totally engulfed him and sent Spike flying, and he wounds Spike with a knife. Pierrot then arms a rocket launcher to finish Spike off, but Spike luckily is able to escape by jumping into a nearby river.
Upon finding out Spike survived, he invited him to an amusement park, Space Land, for a "party" where he relentlessly pursued him, shooting with the many weapons of his arsenal. Faye arrived in the Red Tail to help, but Pierrot manages to shoot her down as well. Pierrot showed no signs of slowing down until he accidentally breaks a shop window and a toy cat falls out and starts meowing. This caused him to panic, giving Spike time to regroup. Pierrot and Spike then face off while a parade of carnival robots marches in the background. Just as Pierrot is about to finish Spike off, a flash of light from the parade reflects off of Spike's eyes, reminding Pierrot of the data-cat, filling him with terror. Spike used the opportunity to toss a throwing knife at Pierrot, striking him in the leg. Upon seeing his own blood and feeling the pain of the knife, he descended into a child-like tantrum and cries loudly for his mother. While writhing on the road where the parade is taking place, a gigantic dog robot from the robot parade steps on him, killing him. 
The character was credited as "Tongpu."
Homages and references Edit
- Continuing with the strong musical influences in Cowboy Bebop, the names Mad Pierrot and Tongpu are both references to songs by pioneering Japanese electronic music group Yellow Magic Orchestra.
- This episode gets its name from the 1965 French film of the same name.
- His overall character design is inspired and pays tribute to villians in Batman: The Animated Series.