Barry Quin

as Samuel Keifer

as Dr. Keith Simms

as Dr. Bennett

as Professor Sorvad

as Julian Roberts

as Engineer

as Francis Considine

as Lionel Huxley

as Solicitor

as Gervaise de Lutrelle

as Mr. Scanlon

as Dr. Philip Grigg

as Leutnant Hicks

as The Hon. W. H. Lyttelton

as Richard Barwell

as Hugo Brayford

as Dr. Greg Miller

as Francis Considine

as Ed Jarvis

as Greg