Warning! Contains Spoilers For Batman #147!

Summary

The Jokerhas always been a terrifying villain because of the way he attacks people’s moral centers while trying to prove that anyone could become a twisted monster just like him — if they only had one bad day. But a new bit of information calls into question whether or not the Joker truly believes this.

Readers can see the shocking origin of the Joker’s philosophy in the story “Show the World” by Chip Zdarsky and Miguel Medonca fromBatman#147. In this backup, Dr. Captio, the new warden ofZur-En-Arrh’s Arkham Asylum,is training with the Riddler and remarks that it’s easy to push people down a dark path, that all it takes is"one bad day."

Dr. Capito Repeats Joker’s Iconic Phrase “One Bad Day”

While this seems like a throwaway line, it actually has huge ramifications for the Joker’s philosophy. In fact,the Joker and Dr. Captio have a deep history together,with Capito being the one who actually trained the Joker in everything he knows how to do.

The Joker Travels the Globe Spreading Terror in New Anthology Graphic Novel

Joker: The World will see the Clown Prince of Crime terrorize 13 different countries in the new anthology releasing worldwide in September 2024.

Daniel Captio Reveals All

One of the Joker’s defining characteristics is his belief that only one bad day can drive anyone to madness. This idea is a compelling philosophy, especially considering that Batman famously had one bad day and it completely changed his life. Many would say it drove him insane, considering he dresses up like a bat and punches criminals in the night.The “One Bad Day” philosophyhas stuck to Joker’s character for decades. Even though it’s been proven wrong before, it’s still been a major component of his character since its introduction,but now it seems “One Bad Day” wasn’t even the Joker’s idea.

The Joker’s “one bad day” philosophy was first explored inThe Killing Jokeby Alan Moore and Brian Bolland, on sale now from DC Comics!

Joker: The World cover by Jason Fabok, featuring Joker in the snow.

It was revealed duringThe Joker Year One(by Zdarsky, Giuseppe Camuncoli, and Andrea Sorrentino)that Joker was trained by Dr. Captio, who molded the Joker into the brutal killer he is today. Originally, after the Joker’s “one bad day,” he didn’t take on a new philosophy and become a supervillain. He was actually terrified of Batman and seemingly completely harmless. It was only after Daniel Captio found the Joker and began training him that he turned into the dangerous supervillain that readers know today. This seems to even extend to Joker’s philosophy, asthe fact that Captio uses the exact same wording is a major red flag.

Joker’s Entire World View Was Likely Created By Dr. Captio

Joker’s Mind Was Built by Captio, Including His Twisted Philosophy

Dr. Daniel Captio is an expert on the human mind and has helped plenty of people create new personas and ideologies. It’s entirely because of Captio that Batman created the personality of Zur-En-Arrh. He also helped the Joker create the three different personas that he has used throughout his career as a criminal. It’s not a leap to assume that Captio also likely implanted the idea of “one bad day” into the Joker. Captio created the Joker to be the perfect threat to Batman, and there’s no better way than twisting Batman’s own personal tragedy of one bad day into theJoker’smain philosophy.

BATMAN #147 (2024)

Joker in Batman: The Killing Joke

The Joker

The Joker is a psychopathic criminal mastermind with a warped sense of humor. Initially introduced as a remorseless serial killer, the character evolved over time, often oscillating between a prankster and a homicidal maniac. His relationship with Batman is one of the most complex in comic book history, defined by their mutual obsession. Over the decades, the Joker has become an enduring icon of chaos and madness, embodying the antithesis of Batman’s order and justice.

Batman #147 Main Cover: Bruce holds his Batman cowl in front of other images of Robin Damian Wayne and Amanda Waller.