Warren Hull

The Spider / Richard Wentworth / Blinky McQuade

Mary Ainslee

Nita Van Sloan

Dave O'Brien

Jackson, Wentworth's Aide

Joseph W. Girard

Police Commissioner Kirk

Kenne Duncan

Ram Singh, Wentworth's Hindu Chauffeur

Corbet Morris

McLeod

Bryant Washburn

Westfall

Anthony Warde

Henchman Trigger

Harry Harvey

Stephen

Arthur Belasco

Butler

Stanley Blystone

Policeman

Lane Chandler

Police Lab Fingerprint Man