| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alfred L. Werker | Crew | Directing | Director |
 Angelo Ross | Crew | Editing | Editor |
Borden Mace | Crew | Production | Associate Producer |
 J. Edgar Hoover | Crew | Writing | Writer |
Joseph C. Brun | Crew | Camera | Director of Photography |
Leo Rosten | Crew | Writing | Story, Screenplay |
Lodge Cunningham | Crew | Sound | Sound |
Lothar Wolff | Crew | Production | Associate Producer |
Louis Applebaum | Crew | Sound | Original Music Composer |
Louis De Rochemont | Crew | Production | Producer |
Peter Ratkevich | Crew | Editing | Assistant Editor |
Jack Shaindlin | Crew | Sound | Music Director |
Edward Horton | Crew | Camera | Camera Operator |
George Stoetzel | Crew | Camera | Camera Operator |
Herbert Andrews | Crew | Art | Art Direction |
Ann Thomas | Cast | Actress | Philadelphia Suspect |
Bradford Hatton | Cast | Harry Mason | |
Bruno Wick | Cast | Luther Danzig | |
Ernest Graves | Cast | Actor | Robert Martin |
 Finlay Currie | Cast | Actor | Professor Albert Kafer |
 George Murphy | Cast | Actor | Inspector James 'Jim' Belden |
 George Roy Hill | Cast | Actor | Nicholas Wilben |
 Karl Stepanek | Cast | Actor | Alexi Laschenkov / Gregory Anders |
Lotte Palfi Andor | Cast | Actress | Anna Kafer |
 Mary Young | Cast | Actress | |
 Nancy Hale | Cast | Actress | |
 Peter Capell | Cast | Actor | Chris Zalenko / Gino |
 Rosemary Pettit | Cast | Actress | Mrs. Martin |
 Steve Mitchell | Cast | Actor | Samson |
Vilma Kurer | Cast | Mrs. Rita Foss | |
 Virginia Gilmore | Cast | Actress | Millie / Teresa Zalenko |
Westbrook Van Voorhis | Cast | ||
 Wolfgang Zilzer | Cast | Actor | August Helmuth |
Michael Garrett | Cast | Michael Dorndoff aka Frank Torrance | |
 Louisa Horton | Cast | Actress | Mrs. Elaine Wilben |
Robert Carroll | Cast | Actor | Boldany |
John Farrell | Cast | ||
Eva Condon | Cast | Actress | Landlady |
Karl Weber | Cast | Actor | FBI Agent Charlie Reynolds |
| Person | Type | Job | Role(s) |
