Générique complet
The Silent Witness
Lionel Atwill
Sir Austin Howard
Greta Nissen
Nora Selmer
Helen Mack
Sylvia Pierce
Weldon Heyburn
Carl Blake
Bramwell Fletcher
Anthony Howard
Mary Forbes
Lady Howard
C. Montague Shaw
Inspector Robbins
Wyndham Standing
Sir John Lawson--Barrister
Alan Mowbray
Arthur Drinton
Herbert Mundin
Henry Hammer
Billy Bevan
Horace Ward
Lumsden Hare
Colonel Grayson
