| Ben McKenzie | James Gordon |
| Donal Logue | Harvey Bullock |
| David Mazouz | Bruce Wayne |
| Morena Baccarin | Leslie Thompkins |
| Sean Pertwee | Alfred Pennyworth |
| Robin Lord Taylor | Oswald Cobblepot /
Penguin |
| Erin Richards | Barbara Kean |
| Camren Bicondova | Selina Kyle
(credit only) |
| Cory Michael Smith | Edward Nygma /
The Riddler |
| Jessica Lucas | Tabitha Galavan |
| Chris Chalk | Lucius Fox |
| Drew Powell | Butch Gilzean |
| Maggie Geha | Ivy Pepper
(credit only) |
| Benedict Samuel | Jervis Tetch
(credit only) |
| Michael Chiklis | Nathaniel Barnes
(credit only) |
| Jada Pinkett Smith | Fish Mooney |
| BD Wong | Hugo Strange |
| Nathan Darrow | Victor Fries |
| Camila Perez | Firefly |
| Alexander Siddig | Ra's al Ghul |
| J.W. Cortes | Detective Alvarez
(as JW Cortes) |
| Maceo Oliver | Desk Sergeant |
| Carolyn Seiff | Older Woman |
| Bethany Kay | Bank Teller |
| Michael Blouin | Station Staff |
| Malcolm C. Murray | Leader Warrior |
| Anthony Hoang | Security Guard |
| Ramon Aleman | Mooney Goon #1
(uncredited) |
| Giovanni Celentano | National Guard
(uncredited) |
| Kevin D. McGee | GCPD Officer
(uncredited) |
| Billy Peck | Strike Force
(uncredited) |
| Leroy Phillips Jr. | Sirens Club Patron
(uncredited) |
| Stuart Schnitzer | Core Desk Sergeant
(uncredited) |
| Roberta Thompson | Nurse
(uncredited) |
| Kelly P. Williams | Gotham City Police
(uncredited) |