George Bancroft
— Dr. Clem Driscoll
Helen Burgess
— Ruth Hanlon
John Trent
— Dr. Dan Norris
Ruth Coleman
— Catherine Stanwood
Ronald Sinclair
— Michael Fielding (as Ra Hould)
Molly Lamont
— Mrs. Fielding
Sidney Blackmer
— Dr. Anson Ludlow
Charles Waldron
— Dr. Ellery Stanwood (as Charles D. Waldron)
Frank Puglia
— Louie
Milburn Stone
— Fred Clark
Sue Carol
— Mrs. Mason
Mickey Kuhn
— Boy in Hospital (uncredited)