Did the joker break out of jail?

The Joker has broken out of Arkham Asylum (and other prisons) countless times across DC Comics history — it's practically a running theme! Some of the most memorable escapes include his early Silver Age stories, and more notably in storylines like 'The Killing Joke' where his freedom sets the entire plot in motion. Grant Morrison's 'Arkham Asylum: A Serious House on Serious Earth' also explores how the institution can barely contain him. In modern continuity, writers like Scott Snyder (in 'Death of the Family') treat his escapes as almost routine, underlining just how unstoppable he is.