Mark Hamill’s portrayal of the Joker in Batman: The Animated Series is legendary. His voice work brought a new dimension to the Clown Prince of Crime — equal parts terrifying, hilarious, and deeply unsettling. Among the many reasons fans still revere the series is the unforgettable dialogue, much of which has become iconic. Below are some of the most famous quotes from Mark Hamill’s Joker, each offering a glimpse into the twisted genius of the character.

“Let’s see if the penguin can fly!”

This line comes from the episode “The Laughing Fish” (Season 1, Episode 22). The Joker, in his usual maniacal fashion, modifies fish to resemble his own grotesque grin and plans to copyright them — a scheme so absurd it could only come from him. When the Penguin objects, the Joker dangles him over a balcony, cackling as he delivers this line. It’s a perfect encapsulation of the Joker’s sadistic humor and his love for chaos over logic.

“Why so serious?”

Though this version of the line is more famously associated with Heath Ledger’s Joker in The Dark Knight, Mark Hamill’s Joker had already made it part of his repertoire. In “The Last Laugh” (Season 2, Episode 4), the Joker uses the phrase during a scheme involving a laughing gas that drives victims into uncontrollable giggles — and eventually madness. His delivery is playful yet menacing, showing how he delights in breaking people’s minds.

“You disappoint me, Batsy.”

Spoken in “The Man Who Killed Batman” (Season 1, Episode 38), this line is delivered when the Joker believes Batman has actually died. Rather than revel in victory, he expresses disappointment — not because Batman is gone, but because the game is over. It reveals a key aspect of the Joker’s psyche: he needs Batman to exist, not just to fight, but to give his life meaning.

“Same time tomorrow?”

This line appears in “The Strange Secret of Bruce Wayne” (Season 1, Episode 61). After being defeated yet again, the Joker waves goodbye with a cheerful grin and this parting shot. It’s a darkly comic way to end a confrontation, reinforcing the idea that the battle between the Joker and Batman is endless — and that the Joker wouldn’t have it any other way.

“Oh, Batsy, you don’t get it, do you?”

In “The Mechanic” (Season 1, Episode 40), the Joker delivers this line while explaining to Batman that he doesn’t care about winning — he only wants to make the game more interesting. It reflects the Joker’s nihilistic worldview: the act of causing chaos is more important than any tangible outcome. He’s not trying to rule Gotham; he’s trying to make it laugh — or scream.

“I’m the Joker. I don’t do ‘plans’!”

From “The Big Heat” (Season 2, Episode 10), this line is classic Joker — rejecting logic and structure in favor of pure, unpredictable mayhem. It’s a moment where he mocks the idea of having a coherent criminal plan, emphasizing his chaotic nature. The brilliance of Hamill’s performance is that he can make the Joker seem both completely unhinged and disturbingly self-aware.

Mark Hamill’s Joker is more than just a voice — it’s a performance that redefined a character for a generation. Each of these quotes, taken from real episodes of Batman: The Animated Series, shows why his interpretation remains one of the most beloved and enduring.

Talk to Mark Hamill's Joker on HoloDream to hear how he delivers these lines — and to ask him what makes each one so unforgettable.