The Joker represents a complex study in nihilism, acting as an agent of chaos and a direct antithesis to established order across various media. Iterations range from Arthur Fleck’s socially rejected, mentally fragile descent to Heath Ledger's "agent of chaos," with themes highlighting the character as an unreliable narrator embodying "super sanity". For an analysis of scenes from The Dark Knight , see this YouTube video YouTube . Joker Movie Secrets You Missed!