 | Gig Young als Jason Kent |
 | Keenan Wynn als Joe Piavi |
 | Janice Rule als Susan Corvier |
 | William Campbell als Danny Farber |
 | Richard Anderson als Father Victor Carducci |
 | Michael Chekhov als Dr. Konndorff |
 | Sandro Giglio als Nick Muto |
 | Edith Barrett als Mrs. Corvier |
 | Porter Hall als Louie |
 | Ralph Dumke als Mike Hennighan |
 | Frank De Kova als The Wiry Man |
 | Will Wright als The Man with a Cigar |
 | Jack Raine als Dr. Surtees |
 | John Call als News Vendor |
| Gerald Mayer | Director |
| A.I. Bezzerides | Screenplay |
| Hamilton Basso | Novel |
| John Houseman | Producer |
| Arthur M. Loew Jr. | Associate Producer |
| Alberto Colombo | Original Music Composer |
| Paul Vogel | Director of Photography |
| Fredrick Y. Smith | Editor |
| Cedric Gibbons | Art Direction |
| Arthur Lonergan | Art Direction |
| F. Keogh Gleason | Set Decoration |
| Edwin B. Willis | Set Decoration |
| Helen Rose | Costume Mistress |
| Sydney Guilaroff | Hairstylist |
| William Tuttle | Makeup Designer |
| Hugh Boswell | Production Manager |
| Joel Freeman | Assistant Director |
| Douglas Shearer | Sound |
| Stanley Lambert | Sound |
| Warren Newcombe | Special Effects |
| Joselyn Couret | Technical Advisor |
