 | Stella Stevens als Karen |
 | Roddy McDowall als Robert |
 | Elsa Lanchester als Hester |
 | Shani Wallis als Lady Jocelyn Dwellyn |
 | Farley Granger als Evan Lyons |
 | Victor Buono als Minister |
 | John McGiver als Governor |
 | Bernard Fox als Constable Hooke |
 | Patric Knowles als Douglas Whitehead |
 | Jamie Farr als Dybbi |
 | Norman Stuart als Lord Arnold Dwellyn |
 | Ben Wright als Jonesy |
| Wanda Bailey als Flo |
 | Steven Marlo als 1st Dart Player |
| Leslie Thompson als 2nd Dart Player |
 | Murray Matheson als Lord Arnold Dwellyn (voice / uncredited) |
| Jameson Brewer | Writer |
| John Fenton Murray | Writer |
| Andrew J. Fenady | Producer |
| Charles A. Pratt | Executive Producer |
| George Duning | Original Music Composer |
| Melvin Shapiro | Editor |
| Georg Fenady | Director |
| William B. Jurgensen | Director of Photography |
| Irving Lande | Casting |
| Monty Elliott | Art Direction |
| Carl Biddiscombe | Set Decoration |
| Vou Lee Giokaris | Costume Design |
| Oscar Rodriguez | Costume Design |
| Jack H. Young | Makeup Artist |
| Virginia Jones | Hairstylist |
| George Duning | Songs |
| Andrew J. Fenady | Lyricist |
| Joseph P. Mercurio | Special Effects |
| Dominic Palmieri | Camera Operator |
| Peter E. Berger | Assistant Editor |
| John Caper Jr. | Music Editor |
| Hazel W. Hall | Script Supervisor |
| Daniel McCauley | Assistant Director |
| Jay Daniel | Second Assistant Director |
| Robert Crosby | Sound |
| David Dockendorf | Sound |
| James J. Klinger | Sound |
| David M. Ronne | Sound |
