| George Brent | ... | Capt. Stephen Dennett | |
| Isa Miranda | ... | Felice Falcon | |
| John Loder | ... | Michael Barclay | |
| Nigel Bruce | ... | Col. J.W. Lansfield | |
| Elizabeth Patterson | ... | Nellie | |
| Matthew Boulton | ... | Lloyd | |
| Rex Evans | ... | Jimmy | |
| Cecil Kellaway | ... | Emerson | |
| Walter Kingsford | ... | Wakefield | |
| Ernest Truex | ... | Toutasche | |
| Ralph Forbes | ... | Mr. Perrins | |
| Genia Nikolaieva | ... | Mrs. Perrins | |
| Charles Irwin | ... | Nelson | |
| E.E. Clive | ... | Mr. MacPherson | |
| Vera Lewis | ... | Mrs. MacPherson | |
| Edward Gargan | ... | Lou | |
| David Clyde | ... | Bartender | |
| rest of cast listed alphabetically: | |||
| Norman Ainsley | ... | Second Immigration Officer (uncredited) | |
| Jimmy Aubrey | ... | Waiter (uncredited) | |
| Ambrose Barker | ... | Customs Officer (uncredited) | |
| Guy Bellis | ... | First Immigration Officer (uncredited) | |
| Charles Bennett | ... | Cockney Sailor (uncredited) | |
| George Calliga | ... | French Sailor (uncredited) | |
| Virginia Lee Corbin | ... | Nightclub Woman (uncredited) | |
| Rex Downing | ... | Buttons (uncredited) | |
| Bess Flowers | ... | Gardens Club Patron (uncredited) | |
| Douglas Gordon | ... | Steward (uncredited) | |
| Roger Gray | ... | Sergeant at Airport (uncredited) | |
| William Haade | ... | Tatooed American Sailor (uncredited) | |
| Bobby Hale | ... | Batman (uncredited) | |
| Sam Harris | ... | Bill (uncredited) | |
| Keith Hitchcock | ... | Doorman (uncredited) | |
| Jack Lee | ... | Tailor (uncredited) | |
| Anthony Marsh | ... | Cadet (uncredited) | |
| Louis Mercier | ... | French Sailor (uncredited) | |
| Edmund Mortimer | ... | Gardens Club Patron (uncredited) | |
| Susan Paley | ... | Undetermined Role (uncredited) | |
| Hi Roberts | ... | Bellboy (uncredited) | |
| Wilfred Roberts | ... | Man (uncredited) | |
| Gerald Rogers | ... | Steamship Clerk (uncredited) | |
| Larry Steers | ... | Nightclub Patron (uncredited) | |
| Harry Stubbs | ... | Stout Man on Boat (uncredited) | |
| David Thursby | ... | First English Sailor (uncredited) | |
| Janet Waldo | ... | Telephone Operator (uncredited) | |
| John Ward | ... | Second English Saiilor (uncredited) | |
| Carleton Young | ... | Sailor (uncredited) | |
Directed by | |||
| George Fitzmaurice | |||
Writing credits | ||
| Frank O'Connor | (story) | |
| Leonard Lee | and | |
| Franz Schulz | ||
Produced by | |||
| A.M. Botsford | .... | producer (uncredited) | |
| William LeBaron | .... | executive producer (uncredited) | |
Original Music by | |||
| Charles Bradshaw | (uncredited) | ||
| Sigmund Krumgold | (uncredited) | ||
| John Leipold | (uncredited) | ||
| Leo Shuken | (uncredited) | ||
Cinematography by | |||
| Charles Lang | |||
Film Editing by | |||
| LeRoy Stone | |||
Art Direction by | |||
| Hans Dreier | |||
| Robert Usher | |||
Set Decoration by | |||
| A.E. Freudeman | (interior decorator) | ||
Costume Design by | |||
| Edith Head | |||
Second Unit Director or Assistant Director | |||
| George Templeton | .... | assistant director | |
Sound Department | |||
| Richard Olson | .... | sound recordist | |
Music Department | |||
| Sigmund Krumgold | .... | musical director | |
| George Antheil | .... | composer: stock music (uncredited) | |
Other crew | |||
| L.A. Fleishman | .... | dialogue director | |
| Eugene Joseff | .... | jeweller (uncredited) | |
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| After Midnight with Boston Blackie | Secret Agent X-9 | The Lone Wolf Strikes | Trapped by Boston Blackie | Federal Agents vs. Underworld, Inc. |
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| Full cast and crew | Company credits | IMDb Crime section |
| IMDb USA section |