as Samuel Keifer
as Dr. Keith Simms
as Dr. Bennett
as Julian Roberts
as Engineer
as Professor Sorvad
as Dr. Philip Grigg
as Dr. Greg Miller
as Ed Jarvis
as Mr. Scanlon
as Lionel Huxley
as Solicitor
as Gervaise de Lutrelle
as Richard Barwell
as Leutnant Hicks
as The Hon. W. H. Lyttelton
as Hugo Brayford
