 | Errol Flynn als Corporal Steve Wagner |
 | Julie Bishop als Laura McBain |
 | Helmut Dantine als Colonel Hugo von Keller |
 | Gene Lockhart als Ernst Willis |
 | John Ridgely als Jim Austen |
 | Tom Tully als Inspector Barnett |
 | Alec Craig als Angus McBain |
 | Rose Higgins als Rose Dagor (uncredited) |
 | Bernard Nedell als Tom Dagor |
 | Tom Drake als Heinzmann (uncredited) |
| Richard Allord als Jochim Preisser (uncredited) |
 | Warren Douglas als Sergeant (scenes deleted) |
 | Monte Blue als Jean |
 | John Alvin als Orderly (uncredited) |
| Robert Ashley als German Ski Trooper (uncredited) |
 | Glen Cavender als Workman (uncredited) |
| Ken Christy als Winnipeg Police Desk Sergeant (uncredited) |
 | Wallis Clark als Judge (uncredited) |
| Robert Dayne als German Ski Trooper (uncredited) |
| Jim Dugan als Mountie (uncredited) |
| Alf Engen als Nazi Soldier (uncredited) |
| Ben Erway als Immigration Officer (uncredited) |
 | Tom Fadden als Hobby (uncredited) |
 | Jim Farley als Turnkey (uncredited) |
 | John Forsythe als Corporal (uncredited) |
| Arno Frey als Submarine Captain (uncredited) |
| Bob Gary als Nazi Soldier (uncredited) |
| Rudy Germane als German Agent (uncredited) |
 | Arthur Gould-Porter als Little Man on Train (uncredited) |
 | Chuck Hamilton als Bailiff at Winnipeg Trial (uncredited) |
| Carl Harbaugh als Radio Operator (uncredited) |
 | Joe Haworth als Mountie (uncredited) |
| George Herrera als Mountie (uncredited) |
| Joe Herrera als Indian Guide (uncredited) |
 | Herbert Heywood als Farmer (uncredited) |
 | Russell Hicks als Chief Inspector (uncredited) |
 | Robert Hutton als Internment Camp Guard (uncredited) |
| Paul Irving als Lawyer (uncredited) |
 | Charles Judels als Nick - Barber (uncredited) |
 | Fred Kelsey als Train Conductor (uncredited) |
 | Bill Kennedy als Mountie (uncredited) |
 | Jack Kenny als Guest at Inn (uncredited) |
 | Robert Kent als Soldier (uncredited) |
| Donald Kerr als Reporter at Winnipeg (uncredited) |
 | Milton Kibbee als Hotel Clerk (uncredited) |
| Guy Kingsford als Campbell - Mountie at Post (uncredited) |
| George Kirby als Hotel Clerk (uncredited) |
| John Lannon Jr. als German Ski Trooper (uncredited) |
 | George Lynn als Johnson - Mountie (uncredited) |
| Lou Marcelle als Opening Off-Screen Narrator (voice) (uncredited) |
| Charles Marsh als Man in Camel Hair Coat (uncredited) |
| Clay Martin als Nazi Soldier (uncredited) |
 | Lester Matthews als Colonel (uncredited) |
 | James Millican als Army Driver (uncredited) |
| Pat Moriarity als Recruiting Sergeant (uncredited) |
 | Jack Mower als Police Officer in Courtroom (uncredited) |
| Martin Noble als German Cook (uncredited) |
 | Frank O'Connor als Train Station Passenger (uncredited) |
| William Osten als German Sergeant (uncredited) |
 | Jack Perrin als Train Conductor (uncredited) |
 | Hugh Prosser als Corporal (uncredited) |
| John Royce als German Aviator (uncredited) |
| Eddie Searles als German Ski Trooper (uncredited) |
| George Sherwood als Ticket Seller (uncredited) |
 | Jay Silverheels als Indian (uncredited) |
 | Ray Spiker als Passerby (uncredited) |
| Cliff Storey als German Ski Trooper (uncredited) |
| Sam Waagenaar als German Assistant Cook (uncredited) |
| Glen Walters als Guest at Inn (uncredited) |
 | Leo White als Train Passenger (uncredited) |
 | Tom Wilson als Guest at Inn (uncredited) |
| Raoul Walsh | Director |
| Frank Gruber | Screenplay |
| Alvah Bessie | Screenplay |
| Leslie T. White | Story |
| Adolph Deutsch | Original Music Composer |
| Sidney Hickox | Director of Photography |
| Jack Chertok | Producer |
| Leo K. Kuter | Art Direction |
| Jack L. Warner | Executive Producer |
| Jack Killifer | Editor |
| William Faulkner | Writer |
| Casey Roberts | Set Decoration |
| Leah Rhodes | Costume Design |
| Perc Westmore | Makeup Artist |
| Louis Baum | Unit Manager |
| James McMahon | Assistant Director |
| Don Siegel | Second Unit Director |
| Tyrus Wong | Art Department Assistant |
| Stanley Jones | Sound |
| Roy Davidson | Special Effects |
| Buster Wiles | Stunt Double |
| Leo F. Forbstein | Music Director |
| Jerome Moross | Orchestrator |
| Howard Jackson | Music |
| Jerome Moross | Music Arranger |
| Max Steiner | Music |
| Bruce Carruthers | Technical Advisor |
| Hugh Cummings | Dialogue Coach |
| Jack L. Warner | Presenter |
| Alf Engen | Technical Advisor |
| James Leicester | Editorial Staff |
| Don Siegel | Editorial Staff |
