Donald Cook as FBI Agent Dave Elliott

Evalyn Knapp as Maxine Travers

Theodore von Eltz as Mr. Walsh

Warren Hymer as Terence 'Midget' Regan

J. Carrol Naish as 'Lefty' Tate

Herbert Rawlinson as J.W. Keaton

Kane Richmond as J.W. 'Jack' Keaton, Jr.

Edward Hearn as Insp. Stone

James P. Burtis as Lacey

Clay Clement as Insp. Arthur M. Preston

Reed Howes as FBI Agent Bob Arnold

Morgan Wallace as H. Van Cleve

Monte Carter as Giuseppe Tomasso Giaconelli

Al Bridge as Hanover - Walsh's Henchman

Earl Eby as FBI Agent Nash

Lynton Brent as FBI Agent Connors

George Chesebro as Sardo - Walsh's Henchman

Mary Gwynne as Woman

Frank Marlowe as G-Man

Lillian Castle as Mary - Old Barfly

Donald Kerr as Reporter

Edwin Argus as Character

Jack Gustin as Henchman

David Worth as FBI Agent

Allen Connor as Official

Tom Brower as Elderly Man

Harry Harvey as Short Pool Player

Robert Homans as Fat Pool Player

Allan Cavan as One of Keaton's Lieutenants

Earl Dwire as Secretary

John Ince as One of Keaton's Lieutenants

Lee Phelps as One of Keaton's Lieutenants

Alphonse Martell as Jeweller