Eliot Ness
Mona Valentine
Daniel Oates
Frank Halloway
Agent Martin Flaherty
Dr. James Crenshaw
Tomaso Fellini
Tuki
Jack Rossman
Narrator (voice)
Casino Patron (uncredited)
Man at Dance Marathon (uncredited)
Man Outside Diner (uncredited)
Police Officer (uncredited)
Hotel Proprietor (uncredited)
Club Patron (uncredited)
Ed Johnson (uncredited)
Charley Brant (uncredited)
Doctor (uncredited)
Police Captain (uncredited)
Train Passenger (uncredited)
Telephone Supervisor (uncredited)
Dealer (uncredited)
Police Photographer (uncredited)
Train Conductor (uncredited)