Michael O'Shea

Character: Jack London

Susan Hayward

Character: Charmian Kittredge

Osa Massen

Character: Freda Maloof

Harry Davenport

Character: Prof. Hilliard

Frank Craven

Character: Old Tom

Virginia Mayo

Character: Mamie

Ralph Morgan

Character: George Brett

Jonathan Hale

Character: Kerwin Maxwell

Edward Earle

Character: James Hare

Morgan Conway

Character: Richard Harding Davis