- Author:
- Sir Arthur Conan Doyle
- Adapted by:
- C.E. Webber
- Producer:
- Naomi Capon
- Film cameraman:
- David Prosser
- Film editor:
- Ron de Mattos
- Designer:
- Susan Spence
- Kate Harston:
- Elaine Usher
- John Girdlestone:
- Andrew Cruickshank
- Tom Dimsdale:
- James Sharkey
- Major Tobias Clutterbuck:
- Joseph O'Conor
- Sigismund von Baumser:
- Leonard Sachs
- Ezra Girdlestone:
- Alan Dobie
- Burt:
- Eric Thompson
- Farintosh:
- Colin Jeavons
- Jim:
- Geoffrey Hibbert
- Harry:
- Shay Gorman
- Diamond miner:
- Tim Hudson
- Diamond miner:
- Peter Lamsey
- Diamond miner:
- David Landee
- Diamond miner:
- David Ludman
- Diamond miner:
- Walter Randall
