WARNING: Only spoilers from season 4 are marked. Certain characters' placements on the lists, or even their presence, may qualify as a Late-Arrival Spoiler. You Have Been Warned.
Main Heroes and Villains
- Gotham City Police Department and Other Officials
- Future Members of Batman's Rogues Gallery
- Cellblock A (Arthur Penn to Jeremiah Valeska)note Arthur Penn/ The Ventriloquist, "Basil"/ Clayface, Bridget Pike/Firefly, Butch Gilzean/ Solomon Grundy, Dr. Hugo Strange, Ecco/ Mummer, Eduardo Dorrance/ Bane, Ivy Pepper/ Poison Ivy, Jervis Tetch/Mad Hatter,
- Cellblock B (Jonathan Crane to Victor Zsasz)note Jonathan Crane/ Scarecrow, Lazlo Valentin/Professor Pyg, Oswald Cobblepot/ The Penguin, Ra's Al Ghul, Selina Kyle/ Catwoman, Victor Fries/ Mister Freeze, Victor Zsasz
- Wayne Manor and Enterprises
Groups of Criminals
Independent Criminals
Other