When a ransom bid results in the death of a child, the police have only one lead – the old lady who witnessed the kidnapper using a public phone box. Though her recollection is vague, she volunteers to act as bait for the killer – telling the press that she had seen the kidnapper's face and she waits for him to attack.
Unfortunately the movie Do You Know This Voice? is not yet available on Disney Plus.
| Directing | Frank Nesbitt | Director |
| Writing | Evelyn Berckman | Novel |
| Writing | Neil McCallum | Screenplay |
| Production | Barbara Allen | Production Secretary |
| Camera | Laurie Ridley | Still Photographer |
| Sound | Tom Buchanan | Boom Operator |
| Camera | Louis H. Lavelly | Focus Puller |
| Sound | Colin Miller | Assistant Sound Editor |
| Sound | Buster Ambler | Sound Recordist |
| Editing | Robert Winter | Editor |
| Camera | Len Harris | Camera Operator |
| Sound | Spencer Reeve | Sound Editor |
| Directing | Ray Freeborn | Third Assistant Director |
| Camera | Arthur Lavis | Director of Photography |
| Directing | Gordon Gilbert | Assistant Director |
| Costume & Make-Up | Jean Fairlie | Wardrobe Supervisor |
| Sound | Philip Martell | Conductor |
| Costume & Make-Up | Harold Fletcher | Makeup Artist |
| Directing | Renée Glynne | Continuity |
| Art | Peter Russell | Assistant Art Director |
| Directing | Michael Dryhurst | Second Assistant Director |
| Production | Jack Parsons | Producer |
| Art | George Provis | Art Direction |
| Sound | Carlo Martelli | Original Music Composer |
| Art | Tony Reading | Draughtsman |
| Production | Clifton Brandon | Production Manager |
| Costume & Make-Up | Joyce James | Hairdresser |
| Sound | Barbara Hopkins | Sound |
