George O'Brien
— Henry Potter
Dorothy Mackaill
— Marcelle
Cyril Chadwick
— Captain Trevelan
Ralph Lewis
— Thomas Potter
Emily Fitzroy
— Aunt Isabel
Harvey Clark
— Charles Reisling
Edward Peil Sr.
— Sam Shu Sin
David Kirby
— Gibson
James Gordon
— Captain Gallon
Walter Wilkinson
— Henry Potter (at age 4)
Winston Miller
— Henry Potter (at age 12)