He's Batman's greatest foe, an agent of chaos, and a psychological puzzle. Join WatchMojo as we delve into the mind of the Joker to explore his potential insanity, his relation to Jungian archetypes, and whether he truly suffers from mental illness or something far more complex. We'll analyze different interpretations of the character, from Heath Ledger's chaotic mastermind to Joaquin Phoenix's broken soul, to unravel the mystery behind the Clown Prince of Crime.