- Writer:
- Gil North
- Animals trained by:
- John Holmes
- "Detective" theme music composed by:
- John Addison
- Incidental Music:
- Dudley Simpson
- Script Editor:
- Max Marquis
- Script Editor:
- John Gould
- Designer:
- Margaret Peacock
- Producer:
- David Goddard
- Director:
- Terence Dudley
- Maigret (Introduction):
- Rupert Davies
- Detective-Sergeant Cluff:
- Leslie Sands
- Inspector Mole:
- Doel Luscombe
- Duty Constable:
- Frank Pettitt
- Constable Barker:
- John Rolfe
- Mona Harris:
- Susanna Carroll
- Whitaker:
- Allan McClelland
- Young clerk:
- Robert Fyes
- Elderly clerk:
- David Kirk
- Mrs Cockshott:
- Jeanne Watts
- Mrs Whitaker:
- Margaret Ward
- Miss Hewson:
- Polly Murch
- Harris:
- Michael Cover
- Johnson:
- John Kirby
- Waitress:
- Margaret Carlisle
- Annie Croft:
- Anna Wing
- Police Constable:
- James McManus
- Dr Hamm:
- Derek Benfield
- Cleaner:
- Doris Rogers
- Nurse:
- Mary Fouracres
