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Harley Quinn: The Animated Series
Although he did not appear in the main show until Season 3, Dick Grayson appears as Nightwing in The Eat Bang Kill Tour, which is set after the events of Season 2. He is shown to still be based in Bludhaven, where he runs into Harley and Ivy, who are on the run from Commissioner Gordon during their cross-country road trip.
Dick later appears in Legion of Bats!, taking place after Season 3, where he works with the Bat Family (sans Batman) alongside a morally-confused Harley to fight against the rise of Black Mask.
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