Générique complet
The Silent Barrier
Sheldon Lewis
Mark Bower
Corinne Barker
Millicent Jacques
Florence Dixon
Helen Wynton
DC
Donald Cameron
Charles K. Spencer
Gladys Hulette
Etta Stampa
Adolph Milar
Stampa (as Adolf Milar)
EB
Ernest Des Baillets
Barth
Fuller Mellish
McKenzie
Joseph Burke
Professor Lammenois
Mathilde Brundage
Lady Lavasour
JR
John Raymond
Sir George Lavasour (as Jack Raymond)
RK
Robert Lee Keeling
Delavere (as Rob Lee Keeling)
