Bernard Lee
Henry Houghton
Acting
William Sylvester
Gordon Lonsdale
Acting
Margaret Tyzack
Elizabeth Gee
Acting
David Kossoff
Peter Kroger
Acting
Nancy Nevinson
Helen Kroger
Acting
Thorley Walters
Cmdr. Winters
Acting
Gillian Lewis
Marjorie Shaw
Acting
Newton Blick
P.O. Meadows
Acting
Philip Latham
Captain Ray
Acting
Cyril Chamberlain
Anderson
Acting
Justine Lord
Christina
Acting
Patrick Barr
Captain Warner
Acting
Derek Francis
Chief Supt. Croft
Acting
Hector Ross
Supt. Woods
Acting
Paul Eddington
Johnnie (uncredited)
Acting
Richard Marner
Colonel Monat (uncredited)
Acting
Geoffrey Palmer
Police Officer (uncredited)
Acting
Bryan Pringle
Surveillance Man (uncredited)
Acting
Andre Mikhelson
Russian Embassy Official (uncredited)
Acting
Garry Marsh
First Member at Lords (uncredited)
Acting
Basil Dignam
Second Member at Lords (uncredited)
Acting
Brian Nissen
Portland Official (uncredited)
Acting
Edwin Apps
Blake (uncredited)
Acting
Fred Griffiths
News Vendor (uncredited)
Acting
Anita West
Tilly (uncredited)
Acting