Bernard Lee

Henry Houghton

William Sylvester

Gordon Lonsdale

Margaret Tyzack

Elizabeth Gee

David Kossoff

Peter Kroger

Nancy Nevinson

Helen Kroger

Thorley Walters

Cmdr. Winters

Gillian Lewis

Marjorie Shaw

Newton Blick

P.O. Meadows

Philip Latham

Captain Ray

Cyril Chamberlain

Anderson

Justine Lord

Christina

Patrick Barr

Captain Warner

Derek Francis

Chief Supt. Croft

Hector Ross

Supt. Woods

Paul Eddington

Johnnie (uncredited)

Richard Marner

Colonel Monat (uncredited)

Geoffrey Palmer

Police Officer (uncredited)

Bryan Pringle

Surveillance Man (uncredited)

Andre Mikhelson

Russian Embassy Official (uncredited)

Garry Marsh

First Member at Lords (uncredited)

Basil Dignam

Second Member at Lords (uncredited)

Brian Nissen

Portland Official (uncredited)

Edwin Apps

Blake (uncredited)

Fred Griffiths

News Vendor (uncredited)

Anita West

Tilly (uncredited)