- Novel By:
- Roy Horniman
- Adapted By:
- Gilbert Travers Thomas
- Unknown:
- Robert Hamer
- Unknown:
- John Dighton
- Produced By:
- David H. Godfrey
- Warder:
- Leonard Woodrow
- Mr Elliott:
- Gordon Faith
- Prison Governor:
- John Boxer
- Louis D'Ascoyne Mazzini:
- Dennis Price
- Mrs Mazzini:
- Ev* Stuart
- Mr Perkins:
- Alan Haines
- Sibella:
- Jane Wenham
- Lionel Holland:
- Gordon Gardner
- Charles Ascoyne D'Ascoyne:
- Nigel Graham
- Priscilla:
- Rosalind Shanks
- Boatman:
- Tlmothy Harley
- Lord Ascoyne D'Ascoyne:
- Edward Chapman
- Henry D'Ascoyne:
- Fraser Kerr
- Edith D'Ascoyne:
- Diana Olsson
- The Rev Lord Henry D'Ascoyne:
- Wilfrid Carter
- Lady Agatha D'Ascoyne:
- Margaret Wolfit
- Ethelred, Duke of Chalfont:
- David March
- Admiral Lord Horatio D'Ascoyne:
- Hector Ross
- General Lord Rufus D'Ascoyne:
- Hamlyn Benson
- Hoskins:
- Kenneth McClellan
- Crown Counsel:
- Noel Howlett
