We’ve already looked at the evolution of her Mistah J, but now it’s time for a lookback at the history of the Clown Princess of Crime herself – Harley Quinn…
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Set in the same continuity as BTAS, Batman Beyond: The Return of the Joker reveals that Harley actually got a happy ending. At the end of the TV movie, two members of the Jokerz gang are bailed from jail by their grandmother ‘Nana Harley.’ With the Joker dead years ago, it seems Harley managed to move on and raise a family. Even if her granddaughters did follow in her footsteps!

Originally Warner Bros. planned to follow up 1998’s Batman & Robin with Batman Unchained (also called Batman Triumphant). It would have seen George Clooney’s Bats face Harley Quinn, who was here the daughter of Jack Nicholson’s Joker out for revenge for her father. Apparently the frontrunner for the role was Madonna.

Harley’s actual first live-action appearance was in the short-lived (and mostly forgotten) TV series Birds of Prey from the early 2000s. Uniquely, it featured Harley as the big bad – she was running Gotham’s underworld on her own after the disappearance of Joker (and Batman) sometime previously. She was played by Mia Sara.

Hyden Walch reprised her role for the straight-to-DVD movie Batman: Assault on Arkham. Set in the universe of the Batman: Arkham video games, this Harley had ditched her puddin’ and was in a relationship with fellow Suicide Squad member Deadshot. Let’s just say the Joker was not best pleased with that.