| 角色 | 演員 | 備註 |
| Agent Tom Brant | Milburn Stone |
|
| Janet Lowe | Jan Wiley |
|
| Detective Lt. Jack Ryan | Dennis Moore |
|
| Gerhard Doenitz, alias Garret Donahue | Addison Richards |
|
| Prof. Elwood Henderson | Byron Foulger |
|
| Dorothy Newton | 瑪瑞絲·韋克松（Maris Wrixon） |
|
| Aggie | Sarah Padden |
|
| Herman, Chief Thug | George Lynn |
|
| Police Chief Michael J. O'Brien | Russell Hicks |
|
| Arnold Hoffman aka Hoff, M-3 | Roland Varno |
|
| Migsy (Street Urchin) (as Alfred La Rue) | 拉什·拉魯（Lash La Rue） |
|
| Dan, Boys' Club Member | Jerry Shane |
|
| Spike, Boys' Club Member (as Neyle Marx) | Neyle Marx |
|
| Walter Stark, Council Member M-6 [Chs.1-5] | John Eldredge |
|
| Flash Faust (uncredited) | Ernie Adams |
|
| Flamingo Club Bouncer (uncredited) | Richard Alexander |
|
| M-5 (uncredited) | Robert Barron |
|
| Boys' Club Member (uncredited) | Harris Berger |
|
| Charter Plane Steward (uncredited) | Charles Blake |
|
| Heifel (uncredited) | Walter Bonn |
|
| Jakob Braun aka Jake Brown, M-7 (uncredited) | George M. Carleton |
|
| Man on Street (uncredited) | Horace B. Carpenter |
|
| Fireman Dragging Hose (uncredited) | George Chesebro |
|
| Riverton Tower Switchman (uncredited) | Jack Clifford |
|
| Riverton Railroad Official in Tower (uncredited) | 埃德蒙·科博（Edmund Cobb） |
|
| Apartment Thug (uncredited) | Kernan Cripps |
|
| Reicher (uncredited) | Dick Curtis |
|
| 2nd Nazi Lab Guard (uncredited) | Sayre Dearing |
|
| Bauer (uncredited) | Joe Devlin |
|
| Editor Phillips (uncredited) | Edward Earle |
|
| Slag Ritter (uncredited) | Matty Fain |
|
| Truck Driver (uncredited) | Al Ferguson |
|
| Pat (uncredited) | William Frambes |
|
| Schmidt (uncredited) | Dick French |
|
| Charter Pilot (uncredited) | John Gannon |
|
| Lug (uncredited) | Buddy Gorman |
|
| Abandoned Warehouse Thug (uncredited) | William Haade |
|
| Guard in Hospital (uncredited) | C. Hamilton |
|
| Johnny (uncredited) | Richard Hirbe |
|
| Bay Street Landlady (uncredited) | Margaret Hoffman |
|
| Pete Clark (uncredited) | Edward Howard |
|
| Boys' Club Member (uncredited) | Kenneth Howell |
|
| M-1's Voice-Man (uncredited) | Arthur Loft |
|
| Luther - Council Member M-9 (uncredited) | Pierce Lyden |
|
| Henchman (uncredited) | Carl Mathews |
|
| Policeman (uncredited) | Charles McAvoy |
|
| Vogel - Council Member M-10 (uncredited) | John Merton |
|
| Boys' Club Extra (uncredited) | George Offerman |
|
| Policeman (uncredited) | Jack Perrin |
|
| Safecracker (uncredited) | Jack Rockwell |
|
| Bat Logan (uncredited) | Gene Roth |
|
| Policeman (uncredited) | David Sharpe |
|
| Fingerprint Clerk (uncredited) | Charles Sherlock |
|
| Policeman / Henchman (uncredited) | Tom Steele |
|
| Bosch (uncredited) | Bob Stevenson |
|
| Apartment Thug (uncredited) | Ben Taggart |
|
| Okey (uncredited) | Joe Tarrell |
|
| Hospital Doctor (uncredited) | Forrest Taylor |
|
| Mr. Butler (uncredited) | Brooke Temple |
|
| Henchman (uncredited) | Ken Terrell |
|
| Policeman in Loft Building (uncredited) | Dale Van Sickel |
|
| Abandoned Loft Thug (uncredited) | Bud Wolfe |
|
| Bill (uncredited) | William Yetter Jr. |
|
| Loft Building Henchman (uncredited) | Clifton Young |
|
