The Black Widow

Bruce Edwards

— Steve Colt

Virginia Lee

— Joyce Winters (as Virginia Lindley)

Carol Forman

— Sombra, The Black Widow

Anthony Warde

— Nick Ward

Ramsay Ames

— Ruth Dayton

I. Stanford Jolley

— Dr. Z.V. Jaffa

Dave Anderson

— Porter-Spy

Theodore Gottlieb

— Hitomu

Virginia Carroll

— Dr. Ann Curry

Gene Roth

— John M. Walker

Sam Flint

— Prof. Henry Weston

LeRoy Mason

— Dr. Godfrey

Forrest Taylor

— Bradley

Ernie Adams

— Blinky

Keith Richards

— Michael Burns

George Chesebro

— J. Carter

Frank Lackteen

— A. Kabob

Carey Loftin

— Spike

Ted Mapes

— Slade

Jack O'Shea

— Finnegan

Gil Perkins

— Burke

John Phillips

— District Attorney Mark

Stanley Price

— Filmore Hagen

Larry Steers

— Dr. Harcourt

Ken Terrell

— Mendoza