Barry Fitzgerald as Lt. Dan Muldoon

Howard Duff as Frank Niles

Dorothy Hart as Ruth Morrison

Don Taylor as Jimmy Halloran

Frank Conroy as Captain Donahue

Ted de Corsia as Willy Garzah

House Jameson as Dr. Lawrence Stoneman

Anne Sargent as Mrs. Halloran

Adelaide Klein as Mrs. Batory

Grover Burgess as Mr. Batory

Tom Pedi as Detective Perelli

Enid Markey as Mrs. Hylton

Mark Hellinger as Narrator (voice)

Jean Adair as Little Old Lady (Uncredited)

Celia Adler as Dress Shop Proprietor (Uncredited)

Janie Alexander as Girl (Uncredited)

Joyce Allen as Shopgirl (Uncredited)

Beverly Bayne as Mrs. Stoneman (Uncredited)

Ralph Brooks as Detective (Uncredited)

Harris Brown as Harvey (Uncredited)

Ralph Bunker as Hoffman (Uncredited)

Walter Burke as Pater Backalis (Uncredited)

Alexander Campbell as Policeman (Uncredited)

Retta Coleman as Crippled Girl (Uncredited)

G. Pat Collins as Charles Meade (Uncredited)

Curt Conway as Det. Nick (Uncredited)

Russ Conway as Ambulance Doctor (Uncredited)

Grace Coppin as Miss Livingston (Uncredited)

William Cottrell as Bisbee (Uncredited)

Harold Crane as Man (Uncredited)

Sarah Cunningham as Nurse (Uncredited)

Johnny Dale as Mr. Stillman (Uncredited)

Denise Doyle as Girl (Uncredited)

Arthur 'Weegee' Fellig as Photographer (Uncredited)

Paul Ford as Henry Fowler (Uncredited)

Andre D. Foster as Jeweler (Uncredited)

Kathleen Freeman as Stout Young Woman on an Elevated Train (Uncredited)

Pearl Gaines as Mrs. Hylton's Maid (Uncredited)

Earle Gilbert as Banker (Uncredited)

Bruce Gordon as Cop at Williamsburg Bridge (uncredited)

William E. Green as Man (uncredited)

Raymond Greenleaf as City Editor (uncredited)

James Gregory as Patrolman Albert Hicks (uncredited)

Chuck Hamilton as Cop (uncredited)

Robert H. Harris as Druggist (uncredited)

Percy Helton as Street Cleaner (uncredited)

Bern Hoffman as Wrestler (uncredited)

Cavada Humphrey as Mother (uncredited)

Edwin Jerome as Publisher (uncredited)

Nicholas Joy as Mr. McCormick (uncredited)

Joe Kerr as Ned Harvey (uncredited)

Judson Laire as Publisher (uncredited)

Perc Launders as Police Photographer (uncredited)

Marion Leeds as Nurse (uncredited)

George Lynn as Detective Fredericks (uncredited)

John Marley as Managing Editor (uncredited)

John McQuade as Detective Dace Constantino (uncredited)

Carl Milletaire as Young Man Who Confesses to Dexter Murder (uncredited)

Virginia Mullen as Martha Swenson (uncredited)

Arthur O'Connell as Sgt. Shaeffer (uncredited)

David Opatoshu as Sgt. Dave Miller (uncredited)

Lee Shumway as Patrolman (uncredited)

Hester Sondergaard as Miss Owens (uncredited)

John Randolph as Ed Garzah (uncredited)

William Cottrell as Bisbee (uncredited)