| 角色 | 饰演者 | 角色介绍 |
| Professor Richard Wanley | 爱德华·罗宾逊 | |
| Alice Reed | 琼·贝内特 | |
| Dist. Atty. Frank Lalor | 雷蒙德·马西 | |
| Dr. Michael Barkstane | Edmund Breon | |
| Heidt/Tim the Doorman | 丹·德亚 | |
| Inspector Jackson Homicide Bureau | Thomas E. Jackson | |
| Mrs. Wanley | Dorothy Peterson | |
| Claude Mazard/Frank Howard/Charlie the Hatcheck Man | Arthur Loft | |
| Collins the Steward | Frank Dawson | |
| Streetwalker (uncredited) | 艾丽斯·艾德里安 | |
| Man at club (uncredited) | Brandon Beach | |
| Dickie Wanley (uncredited) | 罗伯特·布莱克 | |
| Man at club (uncredited) | Paul Bradley | |
| Onlooker at Gallery (uncredited) | Don Brodie | |
| Elsie Wanley (uncredited) | Carol Cameron | |
| Blonde (uncredited) | Claire Carleton | |
| Man at club (uncredited) | James Carlisle | |
| Police Driver (uncredited) | Eddy Chandler | |
| Boy with mother (uncredited) | Freddie Chapman | |
| Garage Man (uncredited) | Alec Craig | |
| News Vendor (uncredited) | Hal Craig | |
| Toll Collector on Henry Hudson Parkway (uncredited) | Joe Devlin | |
| Police Officer Dillon (uncredited) | Tom Dillon | |
| Traffic Cop (uncredited) | Ralph Dunn | |
| Extra at bar (uncredited) | Bess Flowers |
