- Julia Arthur
- Nurse Edith Cavell
- Creighton Hale
- Frank Brooks
- Thomas Brooks
- George Brooks
- George LeGuere
- George Brooks as a Young Man
- William H. Tooker
- General von Blissing
- Jack W. Johnston
- U.S. Minister to Belgium
- Paul Panzer
- Baron von der Lancker
- Joyce Fair
- Joan Clemons
- George Majeroni
- Spanish Minister to Belgium
- Sara Alexander
- Mrs. Clavell
- Amy Dennis
- Edith Cavell as a Young Woman
- Fred Melville
- U.S. Ambassador to Great Britain
- Martin Faust
- Secretary to American Legation at Brussels
- George Dupree
- A Belgian lawyer
- Fred Kalgren
- Captain von Baring
- Louis Sturz
- M. Kirschen
