Jean Muir
— Ellen Haslett
Barton MacLane
— Andrew Beaupre
Henry O'Neill
— Dr. Thomas Haslett
Robert Barrat
— Martin Crane
Addison Richards
— John McNally
Helen MacKellar
— Mrs. Mary Haslett
Gordon Oliver
— Pete Lawson
Joseph Crehan
— Dr. Stuart Hunter
Priscilla Lyon
— Suzanne Haslett
Walter Miller
— Maxwell
Herbert Heywood
— Steve
Ben Hendricks Jr.
— Captain Harper
Tom Browner
— Newspaper Reader (uncredited)
Eddy Chandler
— Driller (uncredited)
Neal Dodd
— Priest (uncredited)
Sam Hayes
— Radio Announcer (uncredited)
Henry Otho
— Gene - Rescue Worker (uncredited)
Paul Panzer
— Pierre - Man Carrying Injured Suzy (uncredited)
Russ Powell
— Toby - the Bartender (uncredited)
Dick Purcell
— Trapped Draegerman (uncredited)
John J. Richardson
— Jack - Pete's Co-Worker (uncredited)
Myrtle Stedman
— Nurse (uncredited)