| 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 |
| Cory Michael Smith | Edward Nygma |
| Jessica Lucas | Tabitha Galavan |
| Chris Chalk | Lucius Fox |
| Drew Powell | Butch Gilzean |
| Maggie Geha | Ivy Pepper
(credit only) |
| Benedict Samuel | Jervis Tetch |
| Michael Chiklis | Nathaniel Barnes
(credit only) |
| John Doman | Carmine Falcone |
| James Carpinello | Mario Falcone |
| Ivana Milicevic | Maria Kyle |
| Anthony Carrigan | Victor Zsasz |
| Alex Corrado | Gabe |
| Julien Seredowych | Jacob |
| Jonathan Fielding | Scientist |
| Benny Elledge | Biolab Guard |
| Bob Sorenson | Priest |
| Kenneth Carrella | Falcone Goon #1 |
| Balint Pinczehelyi | Armed Guard |
| Roger Brenner | Gotham City Paramedic
(uncredited) |
| Rita Duran | Wedding Guest
(uncredited) |
| Jonah Falcon | Bartender
(uncredited) |
| Nicolai Kabana | Wedding Guest
(uncredited) |
| Faith Logan | Wedding Guest
(uncredited) |
| Kevin D. McGee | Wedding Guest
(uncredited) |
| Frank Modica | GCPD Detective
(uncredited) |
| Stuart Schnitzer | Desk Sergeant
(uncredited) |
| Kelly P. Williams | Gotham City Police
(uncredited) |