- Author:
- Georges Simenon
- Dramatised by:
- Hugh Leonard
- Title music composed and conducted by:
- Tony Russell
- Designer:
- Frederick Knapman
- Producer:
- Irene Shubik
- Director:
- Naomi Capon
- Xavier Lhomond:
- Alexander Knox
- Dr. Chouard:
- Peter Howell
- Madame Lhomond:
- Sheila Burrell
- Counsellor Frissart:
- Richard Warner
- Madame Frissart:
- Dorothy Robson
- Dieudonne Lambert:
- John Ronane
- Counsellor Delanne:
- Robert Hollyman
- Clerk of Court:
- Erik Chitty
- Maitre Jouve:
- Keith Pyott
- Superintendent Belet:
- Roger Croucher
- Eugenie:
- Mary Quinn
- Germaine Stevenard:
- Rona Anderson
- Gelino:
- Wolfe Morris
- Joseph Pape:
- Simon Preable
- Louise Bernet:
- Rosamund Greenwood
- Gendarmes, Court Officials, Members of Jury, and Public:
- null [uncredited]