The vows of an ambitious young American priest are tested during World War II. Not only does Father John Flaherty get involved with the black market to raise money for the Vatican, he also falls in love with a young French nun.
| Directing | Frank Perry | Director |
| Writing | Jack-Alain Léger | Novel |
| Writing | Abraham Polonsky | Screenplay |
| Writing | Wendell Mayes | Screenplay |
| Production | David Niven Jr. | Producer |
| Production | Frank Yablans | Producer |
| Production | Kurt Neumann | Associate Producer |
| Sound | John Williams | Original Music Composer |
| Camera | Billy Williams | Director of Photography |
| Editing | Peter E. Berger | Editor |
| Production | Jane Feinberg | Casting |
| Production | Mike Fenton | Casting |
| Art | John DeCuir Jr. | Production Design |
| Art | Stefano Maria Ortolani | Art Direction |
| Art | Joe Chevalier | Set Decoration |
| Art | Carlo Gervasi | Set Decoration |
| Costume & Make-Up | Theoni V. Aldredge | Costume Design |
| Costume & Make-Up | Franco Corridoni | Makeup Artist |
| Costume & Make-Up | Maria Teresa Corridoni | Hairstylist |
| Costume & Make-Up | Luigi Rocchetti | Makeup Artist |
| Production | Kurt Neumann | Production Manager |
| Directing | Gianni Cozzo | Assistant Director |
| Sound | Roy Charman | Sound mixer |
| Sound | William Hartman | Sound Effects Editor |
| Sound | David M. Ice | Sound Effects Editor |
| Camera | Chic Anstiss | Camera Operator |
| Production | Paolo Fabbri | Location Manager |
| Directing | Francesca Roberti | Script Supervisor |
| Sound | Aldo De Martino | Boom Operator |
