Casts
Ian Hendry
as Col Tom Llewellyn
Alan Badel
as Dr. David Neville
Barbara Ferris
as Susan Eliot
Alfred Burke
as Colin Webster
Sheila Allen
as Diana Looran
Ralph Michael
as Minister of Defense
Martin Miller
as Prof. Gruber
Patrick Wymark
as Commander
Harold Goldblatt
as Harib
Bessie Love
as Mrs. Robbin
