Bela Lugosi

Prof. Frederick Brenner aka Karl Wagner

John Archer

Richard Dennison

Wanda McKay

Judy Malvern

Tom Neal

Frankie Mills

Vince Barnett

Charley

Anna Hope

Mrs. Brenner

John Berkes

Fingers Dolan

J. Farrell MacDonald

Capt. Mitchell

Dave O'Brien

Det. Pete Crawford

Lucille Vance

Mrs. Malvern

Lew Kelly

Doc Brooks

Wheeler Oakman

"Trigger" Stratton

Ray Miller

The Big Tramp

George Eldredge

Det. Thompson (uncredited)

Eddie Kane

Police Chief Martin (uncredited)

Wallace Fox