Joan Bannister is the wife of globe-trotting war correspondent David Bannister. Returning to the US, Bannister becomes suspicious when Joan begins keeping company with known Nazi functionaries, notably the sinister Mr. Peter. Suspecting that his own wife may be the elusive “Madame Spy” wanted by American authorities, Bannister is in for quite a few surprises.
| Writing | Clarence Upson Young | Original Story |
| Writing | Clarence Upson Young | Screenplay |
| Writing | Lynn Riggs | Screenplay |
| Directing | Roy William Neill | Director |
| Camera | George Robinson | Director of Photography |
| Sound | Charles Carroll | Sound |
| Production | Marshall Grant | Associate Producer |
| Editing | Ted J. Kent | Editor |
| Art | Jack Otterson | Art Direction |
| Art | Russell A. Gausman | Set Decoration |
| Art | A.J. Gilmore | Set Decoration |
| Costume & Make-Up | Vera West | Costume Design |
| Art | Harold H. MacArthur | Art Direction |
| Sound | Bernard B. Brown | Sound Director |
| Sound | Hans J. Salter | Music Director |
