- Author:
- Sir Arthur Conan Doyle
- Dramatised for broadcasting by:
- David Stringer
- Producer:
- Ayton Whitaker
- Rodney Stone (as narrator):
- Howard Rose
- Polly Hinton:
- Lydia Sherwood
- Sir Charles Tregellis:
- Howieson Culff
- Jim Harrison:
- David Stringer
- Sir Lothian Hume:
- Basil Dignam
- Ambrose:
- John Vere
- Lord Avon:
- Arthur Ridley
- Squire Ovington:
- Bryan Powley
- Rodney Stone (as a young man):
- David Enders
- Anson Stone:
- Howard Rose
- Mrs Stone:
- Joan Clement Scott