| Inmate | Villain |
| Venom Addict | |
| Basil Karlo/Matt Hagen/Preston Payne/Sondra Fuller | |
| Julian Day | |
| Roman Sionis | |
| Mark Desmond | |
| Floyd Lawton | |
| Paul Dekker | |
| Warren White | |
| Waylon Jones | |
| Former Head of the Asylum | |
| Harleen Quinzel | |
| Dr. Alexander Sartorius | |
| Unknown | |
| Drury Walker | |
| One of Batman's first villains to realize that Batman is Bruce Wayne | |
| Arnold Wesker | |
| Vera Klopis | |
| | Inmate | Villain |
| Victor Fries | |
| Lazlo Valentin | |
| Margaret Pye | |
| Thinks he is a Greek God | |
| Lyle Bolton | |
| Harvey Dent | |
| Terry Gene Kase | |
| Curt Calhoun | |
| Edward Nigma | |
| Pamela Isley | |
| Jonathan Crane | |
| Jervis Tetch | |
| Phil Cobb | |
| A renowned chemist who turned to crime | |
| Carves a tally mark somewhere on himself for every victim | |
| Everybody has to pay this debt collector with their lives | |
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