While the Patient Slept

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