The Invisible Killer

Grace Bradley

Sue Walker

Roland Drew

Lt. Jerry Brown

William Newell

Det. Sgt. Pat Dugan

Alex Callam

Arthur Enslee

Frank Coletti

Vani Martin

Sidney Grayler

Lefty Ross

Crane Whitley

Dist. Atty. Richard Sutton

Boyd Irwin

Mr. Cunningham

Jean Brooks

Gloria Cunningham

David Oliver

Llewellyln Worcester, Sutton's Valet

Harry Worth

Tyler, Sutton's Secretary

Ernie Adams

Squint, the Croupier