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)

Lee Shumway

Police Sergeant (uncredited)

Harry Cornell

Brownie (uncredited)