Frank Sinatra

as Sam Laker

Peter Vaughan

as Martin Slattery

Nadia Gray

as Karen Gisevius

Toby Robins

as Ruth

Derren Nesbitt

as Colonel Hartmann

Edward Fox

as Ritchie Jackson

Inger Stratton

as Anna

Cyril Luckham

as Cabinet minister

J.A.B. Dubin-Behrmann

as Joseph

Michael Newport

as Patrick Laker

Roy Hanlon

Victor Beaumont

Stanley Meadows

George Murcell

James Payne

as Man at Printing Press (uncredited)