Three criminals plan to break out of prison the day before their release in order to carry out a daring jewel robbery, intending to establish the perfect alibi by returning to jail afterwards. First however they must get out, a task made more difficult by a new, stricter prison officer.
| Writing | John Warren | Screenplay |
| Camera | Geoffrey Faithfull | Director of Photography |
| Directing | Robert Day | Director |
| Editing | Bert Rule | Editor |
| Writing | Vivian Cox | Story |
| Production | E.M. Smedley-Aston | Producer |
| Writing | Len Heath | Screenplay |
| Sound | Maurice Askew | Sound Recordist |
| Sound | Paddy Cunningham | Sound Recordist |
| Art | John Box | Art Direction |
| Directing | Kip Gowans | Assistant Director |
| Costume & Make-Up | Joyce James | Hairdresser |
| Costume & Make-Up | Jimmy Evans | Makeup Artist |
| Camera | Frank Drake | Camera Operator |
