 | Nigel Davenport als Dr. Ernest D. Hubbs |
 | Michael Murphy als James R. Lesko |
 | Lynne Frederick als Kendra Eldridge |
 | Alan Gifford als Mr. Eldridge |
 | Robert Henderson als Clete |
 | Helen Horton als Mildred Eldridge |
 | David Healy als Radio Announcer (voice) (uncredited) |
| Saul Bass | Director |
| Brian Gascoigne | Original Music Composer |
| Dick Bush | Director of Photography |
| Willy Kemplen | Editor |
| Paul B. Radin | Producer |
| John Barry | Art Direction |
| Verena Coleman | Costume Design |
| Norman Bolland | Sound Recordist |
| Eva Monley | Production Manager |
| Rosemary Burrows | Wardrobe Supervisor |
| John Richardson | Special Effects |
| Freddie Williamson | Makeup Artist |
| William P. Cartlidge | Assistant Director |
| Ivo Nightingale | Location Manager |
| Dennis C. Lewiston | Camera Operator |
| Keith Hamshere | Still Photographer |
| Saul Bass | Title Designer |
| Betty Glasow | Hairdresser |
| Brian Gascoigne | Conductor |
| Iris Rose | Production Secretary |
| Ron Phipps | Production Accountant |
| John Swan | Electrician |
| Norman Reynolds | Assistant Art Director |
| David Vorhaus | Musician |
| Bob Jones | Sound Mixer |
| Ken Middleham | Additional Photography |
| Stomu Yamashta | Additional Music |
| John Poyner | Sound Editor |
| Pamela Carlton | Continuity |
| Alan Arnold | Publicist |
| Bill Welch | Construction Manager |
| Jack Mills | Second Unit Cinematographer |
| Rex Neville | Special Effects |
| Mayo Simon | Writer |
