Ian Hendry
Tom Llewellyn
Alan Badel
David Neville
Barbara Ferris
Susan Eliot
Alfred Burke
Colin Webster
Sheila Allen
Diana Looran
Ralph Michael
Minister of Defense
Patrick Wymark
Commander
Martin Miller
Prof. Gruber
Harold Goldblatt
Harib
Patrick White
Mr. Davidson
Andre Mikhelson
Russian Official
Bessie Love
Mrs. Robbin
Clive Powell
Paul
Yoke-Moon Lee
Mi Ling
Roberta Rex
Nina
Gerald del Sol
Ago
Mahdu Mather
Rashid
Frank Summerscale
Mark
Tom Bowman
General Miller (uncredited)
Peter Thompson
(uncredited)
Jack Berg
(uncredited)
Eddie Boyce
(uncredited)
Ian Cullen
(uncredited)
Joe Dunne
(uncredited)
Ernest Fennemore
(uncredited)
Patrick Halpin
(uncredited)
Philip Johns
(uncredited)
Annette Kerr
(uncredited)
Arnold Lee
(uncredited)
Martin Lyder
(uncredited)
Frank Maher
(uncredited)
Terence Maidment
(uncredited)
Richard Marner
(uncredited)
Leo McKern
(uncredited)
Tony O'Leary
(uncredited)
Bill Rayment
(uncredited)
Michael Robbins
(uncredited)