Roger Quain, escorting two zoo-bound black panthers on the train from Milan to Paris, is unaware that a Western agent, Catherine Ullven, has hidden a microfilm in the collar of one of the animals. But when the train is derailed in the Swiss Alps and the panthers escape, she is forced to involve him in her mission, which now includes enemy agents hunting the microfilm, the animals, Catherine and Roger. Corrected from an original submission by Guy Bellinger.
| Directing | George Sherman | Director |
| Production | Ralph Dietrich | Producer |
| Editing | Ted J. Kent | Editor |
| Camera | Irving Glassberg | Director of Photography |
| Writing | George Zuckerman | Screenplay |
| Art | Bernard Herzbrun | Art Direction |
| Art | Alexander Golitzen | Art Direction |
| Art | Russell A. Gausman | Set Decoration |
| Art | John Austin | Set Decoration |
| Sound | Leslie I. Carey | Sound |
| Sound | Corson Jowett | Sound |
| Sound | Joseph Gershenson | Music Director |
| Costume & Make-Up | Bill Thomas | Costume Design |
| Costume & Make-Up | Joan St. Oegger | Hairstylist |
| Costume & Make-Up | Bud Westmore | Makeup Artist |
| Crew | David S. Horsley | Special Effects |
| Writing | Victor Canning | Novel |
| Sound | Walter Scharf | Original Music Composer |
| Costume & Make-Up | Ruby Felker | Hairstylist |
| Costume & Make-Up | Nick Marcellino | Makeup Artist |
| Production | Lew Leary | Production Manager |
| Directing | Frank Shaw | Assistant Director |
| Camera | David S. Horsley | Still Photographer |
| Camera | Glenn Adams | Still Photographer |
| Camera | Everett Brown | Grip |
| Lighting | Norton Kurland | Gaffer |
| Camera | Kyme Meade | Camera Operator |
| Costume & Make-Up | Joan Joseff | Costume Design |
| Sound | Daniele Amfitheatrof | Music |
| Sound | Bronislau Kaper | Music |
| Sound | Milton Rosen | Music |
| Sound | Hans J. Salter | Music |
| Sound | Frank Skinner | Music |
| Directing | Pat Betz | Script Supervisor |
| Writing | Leonard Lee | Screenplay |
