Delphine Seyrig
Ceil Burrows
Edward Hardwicke
Mike McCarthy
Michael Caine
Maj. John Tarrant
Hermione Baddeley
Hetty
Donald Pleasence
Cedric Harper
Joyce Carey
Miss Monley
Joss Ackland
Chief Supt. Wray
John Vernon
McKee
Catherine Schell
Lady Melissa Julyan
Clive Revill
Alf Chestermann
Yves Afonso
Jacques (uncredited)
Denis Quilley
Bateson
Peter Halliday
Customs Officer (uncredited)
Robert Dorning
Jeweller (uncredited)
Janet Suzman
Alex Tarrant
David Daker
MI5 Man
Derek Newark
Monitoring Policeman
Joseph O'Conor
Sir Edward Julyan
Patrick Barr
Gen. St. John
Del Baker
Shadow (uncredited)
Jill Goldston
Commuter (uncredited)