Peter Lorre as Janos 'Johnny' Szabo

Evelyn Keyes as Helen Williams

Don Beddoe as Lt. James 'Jim' O'Hara

George E. Stone as Dinky

John Tyrrell as Watts

Cy Schindell as Benson

Stanley Brown as Harry

James Seay as Jeff Jeffries

Warren Ashe as Johnson, Reporter

Charles C. Wilson as Chief O'Brien

George McKay as Terry Finnegan

Ernie Adams as Hotel Guest (uncredited)

Sam Ash as Mike Cary - Pilot (uncredited)

Al Bridge as Flop House Manager (uncredited)

Mary Currier as Burn Treatment Nurse (uncredited)

John Dilson as Man at Dock Asking for a Light (uncredited)

Sarah Edwards as Mrs. Perkins (uncredited)

Eddie Foster as Street Passerby Lighting Cigarette (uncredited)

Joel Friedkin as Charlie Perkins (uncredited)

Jack Gardner as Man Calling in Fire (uncredited)

Chuck Hamilton as Gas Station Attendant (uncredited)

Al Hill as Man Cooking in his Room (uncredited)

Walter Merrill as Joe (uncredited)

David Oliver as Ship's Steward (uncredited)

Ralph Peters as Hotel Cook (uncredited)

Lee Phelps as Detective at Cary's Office (uncredited)

Frank Reicher as Dr. Ronald Cheever (uncredited)

Claire Rochelle as Young Shocked Nurse (uncredited)

Lee Shumway as Police Officer 643 (uncredited)

Walter Soderling as Jonathan Harris - Watchmaker (uncredited)

Edwin Stanley as Dr. Alex Beckett (uncredited)

Harry Strang as Clerk Stimson (uncredited)

Ben Taggart as Burn Treatment Doctor (uncredited)