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Warren Hull
The Spider / Richard Wentworth / Blinky McQuade

Iris Meredith
Nita Van Sloan

Richard Fiske
Jackson

Kenne Duncan
Ram Singh

Forbes Murray
Police Commissioner Stanley Kirk

Marc Lawrence
Steve Harmon

Charles C. Wilson
Chase

Eugene Anderson Jr
Johnnie Sands

Ann Doran
Mason's Secretary

Paul Whitney
Gray

Beatrice Curtis
Kate Sands

Gordon Hart
J. Mason

Byron Foulger
Allen Roberts

Donald Douglas
Jenkins

John Tyrrell
Henchman Grafton

Henry Taylor
Wilson (uncredited)