The painting of Don Quintus Quintaro seen in Chapters 11 and 12 is actually that of director Spencer Gordon Bennet in Don Q's costume.
When a mugshot of Donovan (Roy Barcroft) is shown, it reveals that he was prisoner 39013. This is the same prisoner number used in Demônios do Círculo Vermelho (1939) for Charles Middleton's character Harry Crowel.
Chapter titles:
- Chapter 1: Multiple Murders
- Chapter 2: Vendetta
- Chapter 3: Under the Knives
- Chapter 4: Race to Destruction
- Chapter 5: Blackout
- Chapter 6: Forged Evidence
- Chapter 7: Execution By Error
- Chapter 8: Window To Death
- Chapter 9: The Juggernaut
- Chapter 10: Cremation
- Chapter 11: Glass Guillotine
- Chapter 12: Dead Man's Vengeance
The silhouette shown with the opening credits is of Lorna Gray (I).
Body count: 17