Aline MacMahon
— Nurse Sarah Keate
Guy Kibbee
— Detective Lt. Lance O'Leary
Patricia Ellis
— March Federie, Richard's Granddaughter
Hobart Cavanaugh
— Eustace Federie
Dorothy Tree
— Mittie Federie
Robert Barrat
— Adolphe Federie
Helen Flint
— Isobel Federie - Adolphe's Wife
Lyle Talbot
— Ross Lonergan
Henry O'Neill
— Elihu Dimuck
Walter Walker
— Richard Federie
Allen Jenkins
— Police Sgt. Jim Jackson
Eddie Shubert
— Detective Muldoon
Russell Hicks
— Dr. Jay
Brandon Hurst
— Grondal - the Butler
Joseph E. Bernard
— 'Murph' Murphy - the Ballistics Expert (uncredited)
George Chandler
— Evening Bulletin Reporter (uncredited)
Nick Copeland
— Detective Davis aka Johnson (uncredited)
Joseph Crehan
— Evening Bulletin Editor (uncredited)
Bill Elliott
— Bank Teller (uncredited)
Virginia Howell
— Kema - the Cook (uncredited)
Milton Kibbee
— Evening Bulletin Archivist (uncredited)
Henry Otho
— Frank - Detective (uncredited)
John J. Richardson
— Reporter (uncredited)
Ferdinand Schumann-Heink
— Reporter (uncredited)
Harry Seymour
— Photographer (uncredited)
Huey White
— Sarah's Taxi Driver (uncredited)
Jack Wise
— Reporter (uncredited)