Serial Killers

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  Adrian Wentworth (New Earth)
• Alberto Falcone (New Earth)
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  Alexander Luthor (Earth 3)
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  Alexander Wyvern (New Earth)
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  Alexis Kaye (Prime Earth)
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  Anna Marie Borgia (New Earth)
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  Antonio Diego (Burtonverse)
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  April Clarkson (New Earth)
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  Arnold Etchison (New Earth)
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  Austin Phelps (New Earth)

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  Baron Sunday (New Earth)
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  Barry Allen (The Wild Storm)
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  Barton Mathis (Arrowverse)
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  Basil Karlo (Earth-One)
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  Benjamin Gruener (New Earth)
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  Bertok-Raaf (Prime Earth)
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  Bruce Wayne (Arrowverse: Earth-99)
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  Bruce Wayne (Dark Multiverse: Batmanasaurus Rex)
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  Bruce Wayne (Dark Multiverse: King of Pain)
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  Bruce Wayne (Dark Multiverse: The Grim Knight)
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  Bruce Wayne (DC Universe Online: Earth -22)
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  Bruce Wayne (Earth -22)
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  Bruce Wayne (Earth -52)
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  Bruce Wayne (Earth-1099)
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  Bruce Wayne (Last Laugh)
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  Bruce Wayne (Smallville: Earth-Thirteen)
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  Budry (New Earth)

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  Clifford DeVoe (Arrowverse)
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  Clive Yorkin (Arrowverse)
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  Clyde Harris (New Earth)
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  Colby Zag (New Earth)
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  Copperhead (New Earth)
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  Cornelius Stirk (New Earth)
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  Corum Rath (Prime Earth)
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  Curtis Knox (Smallville)

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  Davis Bloome (Smallville)
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  Donna Troy (Prime Earth)
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  Doomsday (Lego Batman)
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  Doomsday (Prime Earth)
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  Doomsday (Titans Tomorrow)
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  Duela Dent (Titans Tomorrow)

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  Edward Nygma (Gotham)
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  Elizabeth Báthory (New Earth)
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  Elizabeth Kane (Arrowverse)
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  Elongated Maniac (New Earth)
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  Eobard Thawne (Arrowverse)
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  Eobard Thawne (Prime Earth)
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  Eon (Prime Earth)
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  Ephram Snow (Prime Earth)
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  Erasmus Rayne (New Earth)
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  Evan Douglas (Prime Earth)

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  Faora Hu-Ul (Earth-One)

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  Gala (Prime Earth)
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  Garfield Lynns (Arrowverse)
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  Gerald Crane (Gotham)

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  Harlequin (Gods and Monsters)
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  Helena Bertinelli (Arrowverse)
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  Helena Bertinelli (DC Extended Universe)
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  Hunter Zolomon (Arrowverse: Earth-2)

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  Jack Smart (Golden Streets of Gotham)
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  Jack the Ripper (Earth-508)
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  Jack the Ripper (New Earth)
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  Jacob de Witt (Prime Earth)
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  Jacob Packer (Earth-19)
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  James Gordon (Gotham by Gaslight Movie)
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  James Gordon, Jr. (New Earth)
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  Jane Cartwright (Gotham)
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  Jane Doe (New Earth)
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  Jane Doe (Prime Earth)
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  Jane Jones (Dark Genesis!)
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  Jason Skolimski (Gotham)
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  Jervis Tetch (Prime Earth)
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  John Kelly (Criminal Sanity)
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  Joker (Batman: Noël)
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  Joker (Batman: Under the Red Hood)
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  Joker (Earth -22)
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  Joker (Earth-31)
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  Joker (Harleen)
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  Joker (Hush Beyond)
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  Joker (Mortal Kombat vs. DC Universe)
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  Joker (New Earth)
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  Joker (Old Lady Harley)
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  Joker (Prime Earth)
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  Joker (Titans Tomorrow)
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  Joker Jr. (Old Lady Harley)
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  Jonathan Crane (Titans Tomorrow)
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  Joseph Falk (Arrowverse)

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  Kal-El (Bump in the Night)
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  Kal-El (Earth -1)

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  Lawrence Tulloch (Prime Earth)
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  Lazlo Valentin (Arkhamverse)
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  Lazlo Valentin (Gotham)
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  Lyle Corley (New Earth)

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  Marcello Panetti (Arrowverse)
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  Martin Hawkins (New Earth)
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  Mary Quintas (New Earth)
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  Massacre (New Earth)
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  Max Kern (New Earth)
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  Michael Amar (New Earth)
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  Mina Chaytan (Arrowverse)
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  Mister Teeth (Prime Earth)
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  Mister Whisper (New Earth)

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  Nanaue (New Earth)
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  Natalia Mitternacht (Prime Earth)
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  Nathan East (Impact)
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  Nicolas Zucco (Titans TV Series)

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  Oliver Queen (Stray Arrow)
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  Oliver Queen (The Wild Storm)
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  Onomatopoeia (New Earth)
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  Onomatopoeia (Prime Earth)
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  Orlin Dwyer (Arrowverse)

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  Pagliacci (Wildstorm Universe)
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  Pamela Isley (Earth-43)

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  Ramsey Murdoch (New Earth)
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  Ramsey Rosso (Arrowverse)
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  Ray Salinger (Earth-1)
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  Red Death (Arrowverse)
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  Richard Grayson clone (Hush Beyond)
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  Richard Redditch (New Earth)
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  Riddler (Earth-1)
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  Roger Goldman (New Earth)
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  Rogol Zaar (Prime Earth)
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  Romat-Ru (Prime Earth)

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  Samuel Morris (New Earth)
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  Samuel Smith (Wildstorm Universe)
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  Selina Kyle (The Gift)
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  Shauna Belzer (Prime Earth)
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  Simon Coltrane (Preacher)
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  Simon Morrison (Arrowverse)
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  Sky Tyrant (Earth 3)
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  Sofia Falcone (New Earth)
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  Spider (Prime Earth)
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  Stag (Prime Earth)
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  Stanley Dover (Arrowverse)
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  Stanley Dover I (New Earth)
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  Sweeney Todd (New Earth)
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  Sylbert Rundine (New Earth)

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  The Man (Arrowverse)
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  Thomas Manchester (New Earth)

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  Victor Zsasz (Arkhamverse)
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  Victor Zsasz (Batman: The Telltale Series)
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  Victor Zsasz (Criminal Sanity)
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  Victor Zsasz (Flashpoint Timeline)
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  Victor Zsasz (Harley Quinn TV Series)
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  Victor Zsasz (Injustice)
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  Victor Zsasz (Lego Batman)
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  Victor Zsasz (New Earth)
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  Victor Zsasz (Prime Earth)
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  Vincent Sobel (Arrowverse)

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  Warren White (Arkhamverse)
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  Waylon Jones (Prime Earth)
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  Will Jones (New Earth)

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  Zumbado (Prime Earth)