"MARKED FOR DOOM! Careers smashed...Romances broken...A lurking figure that strikes with sudden swiftness in the night...Suspense!...Mystery!...Excitement!"
An architect (Chick Chandler) studies the doors of six shops and an apartment house to solve a gem theft/double murder.
Jimmy McMillan
Mary Rawling
Charles Eaton
Capt. Wm. Jaffe
Henry Butler aka Gregor (as Gregory Gay)
Claude Burns
Mable De Rose
Donald Adams
Timothy Green
Detective Morgan (uncredited)
Assistant Director
Music Director
Special Effects
Director of Photography
Art Direction
Set Decoration
Editor
Sound Engineer
Director
Screenplay
Story
Co-Producer
Makeup Artist
Costume Design
Co-Producer