| Ben McKenzie | James Gordon |
| Donal Logue | Harvey Bullock
(credit only) |
| David Mazouz | Bruce Wayne
(credit only) |
| Morena Baccarin | Leslie Thompkins |
| Sean Pertwee | Alfred Pennyworth
(credit only) |
| Robin Lord Taylor | Oswald Cobblepot /
Penguin |
| Erin Richards | Barbara Kean |
| Camren Bicondova | Selina Kyle |
| Cory Michael Smith | Edward Nygma /
The Riddler |
| Jessica Lucas | Tabitha Galavan |
| Chris Chalk | Lucius Fox |
| Drew Powell | Solomon Grundy |
| Crystal Reed | Sofia Falcone |
| Alexander Siddig | Ra's al Ghul
(credit only) |
| Michael Cerveris | Professor Pyg |
| Christopher Convery | Martin |
| Stu 'Large' Riley | Sampson |
| Anthony Carrigan | Victor Zsasz |
| Kelcy Griffin | Harper |
| Nathan Wallace | Male Bookie |
| DeAriesha Mack | Female Bookie |
| Buddy Bolton | The Dentist
(as D. Baron Buddy Bolton) |
| Jose Guns Alves | Muscular Fellow |
| Abraham Makany | Wounded Man |
| Ali Merhi | Arkham Guard |
| Andi Morrow | Brunette |
| Steven Bono Jr. | Thin Man |
| Rinzin Ngodup | Sampson Waiter |
| John Cashin | Sampson's Armed Guard
(uncredited) |
| Larry Chan | Bucket Boy
(uncredited) |
| Preston Lopez | GCPD Cop
(uncredited) |
| Judy Malka | Gotham Citizen
(uncredited) |
| Kevin D. McGee | GCPD Officer
(uncredited) |
| Jesse VanDerveer | Little Rascal
(uncredited) |
| Kelly P. Williams | Gotham City Police
(uncredited) |