- Frank Kumagai - Lum (uncredited)
- Virginia Carroll - Nurse (uncredited)
- Harry Carter - Detective Dietrich (uncredited)
- Clancy Cooper - Detective Eddie (uncredited)
- Henry Slate - Detective MacGregor (uncredited)
- Heinie Conklin - Subway Passenger (uncredited)
- George Eldredge - Fenton (uncredited)
- John Gallaudet - Detective Lieutenant Campion (uncredited)
- Alan Reed - Detective (uncredited)
- Robert Haines - Library Worker (uncredited)
- Jay Loft-Lyn - Microfilm Library Clerk (uncredited)
- Ray Montgomery - Ray, FBI Agent (uncredited)
- Jerry O'Sullivan - FBI Agent Enyart (uncredited)
- Ralph Moody - Coffin Boat Captain (uncredited)
- Roger Moore - Mr. Victor (uncredited)
- Vic Perry - Lightning Louie (uncredited)
- George E. Stone - Willie, Police Desk Clerk (uncredited)
- King Mojave - Elevator Passenger (uncredited)
- Harry Tenbrook - Elevator Passenger (uncredited)
- Stuart Randall - Police Commissioner (uncredited)
- Wilson Wood - Police Driver (uncredited)
- George Berkeley - Secondary Role (uncredited)
- Samuel Fuller
- Samuel Fuller
-
Jules Schermer
- Lionel Newman
- Harry M. Leonard
- Winston H. Leverett
- Paul Shure
Richard Widmark interpreta a Skip McCoy en la película.
Jean Peters hace el papel de Candy.
Thelma Ritter interpreta a Moe Williams en la película.
Murvyn Vye hace el papel de Captain Dan Tiger.
Richard Kiley hace el papel de Joey.
Willis Bouchey hace el papel de Zara.
Milburn Stone interpreta a Detective Winoki en la película.
Parley Baer hace el papel de Headquarters Communist in Chair (uncredited).
Chet Brandenburg hace el papel de Fight Spectator (uncredited).
Frank Kumagai interpreta a Lum (uncredited) en la película.
Virginia Carroll interpreta a Nurse (uncredited) en la película.
Harry Carter interpreta a Detective Dietrich (uncredited) en la película.
Clancy Cooper interpreta a Detective Eddie (uncredited) en la película.
Henry Slate hace el papel de Detective MacGregor (uncredited).
Heinie Conklin interpreta a Subway Passenger (uncredited) en la película.
George Eldredge interpreta a Fenton (uncredited) en la película.
John Gallaudet hace el papel de Detective Lieutenant Campion (uncredited).
Alan Reed interpreta a Detective (uncredited) en la película.
Robert Haines interpreta a Library Worker (uncredited) en la película.
Jay Loft-Lyn hace el papel de Microfilm Library Clerk (uncredited).
Ray Montgomery interpreta a Ray, FBI Agent (uncredited) en la película.
Jerry O'Sullivan interpreta a FBI Agent Enyart (uncredited) en la película.
Ray Stevens hace el papel de FBI Agent (uncredited).
Ralph Moody interpreta a Coffin Boat Captain (uncredited) en la película.
Roger Moore interpreta a Mr. Victor (uncredited) en la película.
Vic Perry interpreta a Lightning Louie (uncredited) en la película.
George E. Stone hace el papel de Willie, Police Desk Clerk (uncredited).
King Mojave hace el papel de Elevator Passenger (uncredited).
Harry Tenbrook hace el papel de Elevator Passenger (uncredited).
Stuart Randall interpreta a Police Commissioner (uncredited) en la película.
Wilson Wood interpreta a Police Driver (uncredited) en la película.
Maurice Samuels interpreta a Peddler (uncredited) en la película.
George Berkeley interpreta a Secondary Role (uncredited) en la película.
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