The legacy of the Clown Prince of Crime is a crowded space, populated by Oscar winners and legendary voice actors. Yet, years after the conclusion of the prequel series Gotham, the conversation surrounding the most impactful live-action interpretation often returns to a performance that was technically never allowed to use the name "Joker." The dual portrayal of the Valeska twins by Cameron Monaghan remains a masterclass in character evolution, offering a multi-faceted look at an ideology rather than just a single man in purple.

In the landscape of 2026, where superhero media has explored every possible multiverse and origin story, the "Proto-Joker" experiment of Gotham feels more innovative than ever. By splitting the essence of the Joker into two distinct individuals—Jerome and Jeremiah Valeska—the show allowed for a deep dive into the chaotic and calculated sides of Batman’s greatest foe without the baggage of a traditional origin story.

Jerome Valeska: The embodiment of pure chaos

When Jerome Valeska first appeared in the season one episode "The Blind Fortune Teller," the impact was immediate. At the time, many were skeptical of a "young Joker" concept, but the sudden shift from a grieving son to a cackling maniac became one of the series' most viral moments. Jerome represented the nihilistic, theatrical, and infectious nature of the Joker mythos.

Jerome’s journey was defined by a desire to tear down the social fabric of Gotham City. He wasn't interested in money or power; he was interested in the punchline. This iteration leaned heavily into the circus-inspired roots of the character. The performance utilized a high-pitched, rasping laugh and grand, sweeping physical gestures that captured the attention of every citizen—and viewer.

What made Jerome specifically effective was his role as a cultural virus. He proved that the Joker didn't need to be a single person to exist; he could be an idea that inspires a cult. Even after his temporary deaths within the show's narrative, his influence lingered, proving that chaos is much harder to kill than a man. For many fans, Jerome was the definitive "Anarchist Joker," echoing the energy of Mark Hamill’s voice work while adding a visceral, live-action dangerousness.

Jeremiah Valeska: The cold logic of a psychopath

If Jerome was the fire that burned the city, Jeremiah Valeska was the ice that froze it. Introduced later in the series as Jerome’s secret twin brother, Jeremiah offered a complete tonal shift. He was a brilliant civil engineer—quiet, polite, and deeply paranoid. Following his exposure to a special "insanity gas" developed by his brother, Jeremiah transformed into something perhaps even more terrifying than Jerome: a sane Joker.

Jeremiah’s version of the villain focused on obsession and structural destruction. He didn't want to just cause a riot; he wanted to rebuild Gotham in his own image, with Bruce Wayne as his only peer. This version of the character drew inspiration from more grounded, psychological interpretations seen in graphic novels like The Killing Joke.

Jeremiah was characterized by his stillness. He rarely raised his voice, and his movements were precise and calculated. This created a profound sense of dread, as the audience never knew when his calm exterior would crack. His relationship with a young Bruce Wayne provided the emotional core of the show’s final seasons, framing the hero and villain as two sides of the same coin—one driven by justice, the other by a dark, twisted sense of brotherhood.

The fusion and the final transformation

By the time Gotham reached its series finale, the narrative had cleverly merged the legacies of both twins. The character known simply as "J" in the ten-year time jump represented a figurative amalgamation. He possessed the calculated genius of Jeremiah but had been physically and mentally scarred into something resembling the chaotic energy of Jerome.

This final form featured the iconic chemical disfigurement, the shock of green hair, and the permanent, haunting grin. Because the show had spent years building the foundation through two different brothers, this final version felt earned. It wasn't just a costume change; it was the result of a decade of trauma, obsession, and philosophical decay.

Watching the transition from a brilliant engineer to a scarred figure in a purple suit showed a commitment to long-form storytelling that few other adaptations have attempted. It allowed the audience to see the "how" and the "why" of the Joker's madness in a way that a two-hour movie cannot accommodate.

Crafting the voice and movement

A significant reason why the Joker Cameron Monaghan portrayal remains so highly regarded is the technical precision of the performance. Playing twins requires more than just a change of wardrobe; it requires a distinct physical and vocal language for each.

For Jerome, the performance was built on spontaneity. His voice would jump octaves, and his facial muscles seemed to be in constant, twitchy motion. It was an exhausting style of acting that demanded high energy. In contrast, Jeremiah’s performance was built on restraint. The voice was lower, more melodic, and almost soothing, which made the threats he uttered even more chilling.

In 2026, as we look back at the various ways actors have approached this role, the ability to play two different versions of the same archetype within the same show is a feat that stands alone. It demonstrated a deep understanding of the source material—recognizing that the Joker is a character of many faces and many "multiple choice" pasts.

The legacy of the Valeska twins in DC history

Though Gotham existed in its own bubble, separate from the main cinematic universes, its influence on how we perceive the Joker's origin is undeniable. The show moved away from the simple "man falls into chemicals" trope and explored the idea of the Joker as a philosophical ancestry.

The Valeska twins suggested that the Joker is a mantle, a response to a city that has gone mad. This theme has resonated in later DC projects, where the idea of multiple Jokers or a "contagious" madness has been explored in both comics and alternative film timelines.

Moreover, the performance helped bridge the gap between the campy villains of the 1960s and the grim-dark antagonists of modern cinema. It managed to be colorful and theatrical while remaining genuinely disturbing. The use of purple suits, trick gadgets, and elaborate traps felt like a love letter to the silver age of comics, while the psychological depth satisfied the demands of contemporary television audiences.

Why it still matters today

Even with new iterations of the Joker appearing in high-budget films and various streaming series, the Valeska twins hold a special place in the fandom. Part of this is due to the sheer screen time the characters were given. Over several seasons, viewers saw the slow-motion car crash of their lives, making the eventual emergence of the Joker feel like a tragedy as much as a triumph of evil.

Furthermore, the performance proved that television is a viable medium for high-stakes comic book storytelling. It didn't need a hundred-million-dollar budget to create a memorable villain; it needed a committed performance and a willingness to take risks with the lore.

As audiences in 2026 continue to revisit Gotham on streaming platforms, the Valeska twins serve as the highlight of the series. They remind us that the best villains aren't just obstacles for the hero, but complex individuals who challenge our understanding of order and chaos. The Joker Cameron Monaghan brought to life wasn't just one man; it was a haunting exploration of the darkness that lives inside everyone, waiting for one bad day to come out and play.