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Appearances
Harley Quinn
Main cast, played by Giancarlo Esposito
- Episode 4x09: Potato Based Cloning Incident (Sep 7, 2023)
- Episode 4x10: Killer's Block (Sep 14, 2023)
Guest cast, played by Giancarlo Esposito
- Episode 1x03: So You Need a Crew? (Dec 13, 2019)
- Episode 1x08: L.O.D.R.S.V.P (Jan 17, 2020)
- Episode 1x09: A Seat at the Table (Jan 24, 2020)
- Episode 2x09: Bachelorette (May 29, 2020)
- Episode 3x10: The Horse and The Sparrow (Sep 15, 2022)
- Episode 4x01: Gotham's Hottest Hotties (Jul 27, 2023)
- Episode 4x04: The First Person to Come Back from a Business Conference Without Chlamydia (Aug 3, 2023)
- Episode 4x05: Getting Ice Dick, Don't Wait Up (Aug 10, 2023)
- Episode 4x08: II Buffone (Aug 31, 2023)