- Author:
- Georges Simenon
- Dramatised by:
- Giles Cooper
- Director:
- Terence Williams
- Designer:
- Eileen Diss
- Music composed by:
- Ron Grainer
- Film cameraman:
- Hugh Wilson
- Film editor:
- Barry Toovey
- Script editor:
- Donald Bull
- Executive producer:
- Andrew Osborn
- Associate:
- Bill Luckwell
- Mado:
- Katherine Blake
- Basso:
- John Slater
- Feinstein:
- Peter Madden
- Chief Inspector Maigret:
- Rupert Davies
- Lenoir:
- Raymond Adamson
- Warders:
- George Curtis
- Warders:
- Bill Matthews
- Lucas:
- Ewen Solon
- Louis:
- Frederick Peisley
- James:
- Philip Latham
- Marthe:
- Pamela Humphrey
- Madame Basso:
- Anna Turner
- Doctor:
- Frank Williams
- Marie:
- Peggyann Clifford
- Waiter:
- Horace Sequeira
- Victor:
- John Southworth
- Maid:
- Vi Delma
