Générique complet
The Crimson Stain Mystery
Maurice Costello
Harold Stanley
Ethel Grandin
Florence Montrose
TM
Thomas J. McGrane
Dr. Burton Montrose
OO
Olga Olonova
Vanya Tosca
WC
William Cavanaugh
Doctor's Assistant
John A. Milton
Layton Parrish (as John Milton)
NT
N.J. Thompson
Jim Tanner
Eugene Strong
Robert Clayton
Lorna Volare
Little girl