- Novel By:
- Josephine Tey
- Produced By:
- Charles Lefeaux
- Sergeant Lillis:
- Ian Sadler
- Constable:
- Derek Birch
- Bill Potticary:
- Cyril Shaps
- Robin Tisdall:
- Owen Holder
- Mrs Pitts:
- Elsa Palmer
- Jay Harmer:
- Guy Kingsley Poynter
- Sir George Burgoyne:
- James Dale
- Det-Inspector Grant:
- Gordon Davies
- Sergeant Williams:
- Patrick Troughton
- Erica Burgoyne:
- Patricia McCarron
- Morgan:
- Hamilton Dyce
- Marta Hallard:
- Frances Rowe
- Lydia Keats:
- Mary Wimbush
- Clement Clements:
- Brian Hayea
- Captain George Mostyn:
- Arthur Lawrence
- Judy Sellers:
- Eleanor Summerfleld
- Lord Edward Champneis:
- Godfrey Kenton
- Mr Erskine:
- Cyril Shaps
- Brother Stephen:
- Arthur Lawrence
- Prior:
- Derek Birch
- Police Inspector:
- T St John Barry
- Mr Toselli:
- Ian Sadlei
- Owen Hughes:
- Alan Reid
