- Writer:
- Agatha Christie
- Dramatised by:
- T. R. Bowen
- Composer:
- Ken Howard
- Make-up designer:
- Sylvia Thornton
- Costume designer:
- Judy Pepperdine
- Designer:
- Ray Cusick
- Produced by:
- George Gallaccio
- Film editor:
- Bernard Ashby
- Photography:
- John Walker
- Director:
- Martyn Friend
- Miss Marple:
- Joan Hickson
- Det Insp Slack:
- David Horovitch
- Anna:
- Juliette Mole
- Bryan Eastley:
- David Beames
- Mrs McGillicuddy:
- Mona Bruce
- Paddington porter:
- Nicholas Blane
- Mary:
- Katy Jarrett
- Desk sergeant:
- Leslie Adams
- Det Sgt Lake:
- Ian Brimble
- Mrs Brogan:
- Rhoda Lewis
- Lucy:
- Jill Meager
- Emma:
- Joanna David
- Luther:
- Maurice Denham
- Dr Quimper:
- Andrew Burt
- Mrs Kidder:
- Pamela Pitchford
- Alexander:
- Christopher Haley
- James:
- Daniel Steel
- Harold Crackenthorpe:
- Bernard Brown
- Alfred Crackenthorpe:
- Robert East
- Cedric:
- John Hallam
- Patmore:
- Alan Penn
- Chief Insp Duckham:
- David Waller
- Arthur Wimbome:
- Will Tacey
- Mme Joliet:
- Jean Boht
- Pianist:
- David Allen
- Dancers:
- Naomi Sorkin
- Dancers:
- Derek Deane
- Francoise:
- Emma Hitching
- Detective sergeant:
- Richard Ashley