- Dramatised by:
- Giles Cooper
- Author:
- Georges Simenon
- Designer:
- Eileen Diss
- Music composed by:
- Ron Grainer
- Film cameraman:
- Peter Hamilton
- Film editor:
- Barry Toovey
- Script editor:
- Donald Bull
- Producer:
- Andrew Osborn
- Director:
- Rudolph Cartier
- Chief Inspector Maigret:
- Rupert Davies
- Lucas:
- Ewen Solon
- Lapointe:
- Neville Jason
- Torrance:
- Victor Lucas
- Peter the Lett:
- Marius Goring
- Hotel clerk:
- Arthur Ridley
- Strophades:
- Peter Illing
- Bell-hop:
- Robert Richards
- Police officer:
- Reg Jessup
- Hotel manager:
- Derek Sydney
- Pepito:
- Roger Delgado
- Berthe:
- Magda Miller
- Barman:
- David Crichton
- Josie:
- Pauline Botty
- Head waiter:
- Charles Russell
- Porter:
- Desmond Cullum-Jones
- Cleo Strophades:
- Lina Lalandi
- Child's voice:
- Denise Bryer
- Striptease artist:
- Sheila McKenzie
