Cast & crew
Break in the Circle (1955)
Directed by Val Guest Written by Val Guest
Cast
| Forrest Tucker | Baron Keller |
| Guy Middleton | Maj. Hobart |
| Arnold Marlé | Prof. Pal Kudnic |
| Eva Bartok | Baron Keller |
| Marius Goring | Baron Keller |
| Eric Pohlmann | Emile |
| David King-Wood | Col. Patchway |
| Guido Lorraine | Franz |
| Fred Johnson | Chief Agent Farquarson |
| Reginald Beckwith | Dusty |
| Andre Mikhelson | Russian thug answering Ludwigstrasse door |
| Stanley Zevic | Russian thug #2 at Ludwigstrasse address |
| Arthur Lovegrove | Bert |
| Derek Prentice | Keller's butler |
| Marne Maitland | The phony Kudnic |
Crew
| Val Guest | Director |
| Val Guest | Writer |
| Michael Carreras | Producer |
| Bill Shore | Assistant Director |
| Ken Cameron | Sound Recordist |
| Len Harris | Camera Operator |
| Dino Di Campo | Sound Editor |
| Connie Willis | Continuity |
| Molly Arbuthnot | Wardrobe Master |
| Philip Leakey | Makeup Artist |
| Monica Hustler | Hairdresser |
| Walter J. Harvey | Director of Photography |
| Mickey Delamar | Associate Producer |
| Doreen Carwithen | Music |
| Bill Lenny | Editor |
| Robin Estridge | Novel |
| Jimmy Sangster | Production Manager |
| H.C. Pearson | Sound Recordist |
| John Hollingsworth | Music Director |
| J. Elder Wills | Art Direction |