- Rachel Gurney - Clara Holland
- Martin Stephens - John Holland
- Waveney Lee - Marcia Holland
- Charles Carson - Robert Holland
- Junia Crawford - Susan
- Henry B. Longhurst - Club Member (as Henry Longhurst)
- Roger Maxwell - Club Member
- Gerald Case - Club Member
- Donald Bisset - Club Member
- Desmond Roberts - Club Member
- Reginald Smith - Club Steward
- MacDonald Parke - Jason Parrish (as Macdonald Parke)
- Mavis Villiers - Adele Parrish
- Ernest Clark - Cmdr. Bates
- Alexander Archdale - Local Doctor (uncredited)
- Basil Dignam - Lt. Cmdr. Evans at P.R.O. (uncredited)
- Mabel Etherington - Nightclub Patron (uncredited)
- Gordon Harris - 2nd Special Branch Man Jones (uncredited)
- Barbara Hicks - Miss Price (uncredited)
- John Horsley - 1st Editor (uncredited)
- Frederick Kelsey - Club Member (uncredited)
- John Le Mesurier - Head of the Admiralty (uncredited)
- Ronald Leigh-Hunt - 2nd Editor (uncredited)
- Richard Marner - Russian Officer Cornered by Max Easton (uncredited)
- William Mervyn - Capt. Balfour (uncredited)
- Andre Mikhelson - 2nd Russian Officer (uncredited)
- John More - American General at Embassy Party (uncredited)
- Dickie Owen - 2nd Policeman (uncredited)
- Frederick Piper - Hall Porter (uncredited)
- Pat Ryan - Nightclub Patron (uncredited)
- Stanley Zevic - 1st Russian Officer (uncredited)
- Guy Hamilton
- Guy Hamilton
- Irene Howard
James Mason interpreta a Cmdr. Max Easton en la película.
George Sanders interpreta a Sir Charles Holland en la película.
Vera Miles hace el papel de Virginia Killain.
Robert Flemyng interpreta a Cmdr. John Larkin en la película.
Oliver Johnston hace el papel de Minister.
William Kendall hace el papel de Tom.
Duncan Lamont interpreta a 1st Special Branch man Gregson en la película.
Harry Andrews hace el papel de Capt. Graham.
Peter Barkworth interpreta a Sub Lt. Brown en la película.
Rachel Gurney hace el papel de Clara Holland.
Martin Stephens interpreta a John Holland en la película.
Waveney Lee hace el papel de Marcia Holland.
Charles Carson hace el papel de Robert Holland.
Junia Crawford interpreta a Susan en la película.
Henry B. Longhurst interpreta a Club Member (as Henry Longhurst) en la película.
Roger Maxwell interpreta a Club Member en la película.
Gerald Case interpreta a Club Member en la película.
Donald Bisset hace el papel de Club Member.
Desmond Roberts hace el papel de Club Member.
Reginald Smith hace el papel de Club Steward.
MacDonald Parke hace el papel de Jason Parrish (as Macdonald Parke).
Mavis Villiers interpreta a Adele Parrish en la película.
Ernest Clark interpreta a Cmdr. Bates en la película.
Alexander Archdale hace el papel de Local Doctor (uncredited).
Basil Dignam hace el papel de Lt. Cmdr. Evans at P.R.O. (uncredited).
Mabel Etherington interpreta a Nightclub Patron (uncredited) en la película.
Gordon Harris interpreta a 2nd Special Branch Man Jones (uncredited) en la película.
Barbara Hicks interpreta a Miss Price (uncredited) en la película.
John Horsley hace el papel de 1st Editor (uncredited).
Frederick Kelsey hace el papel de Club Member (uncredited).
John Le Mesurier interpreta a Head of the Admiralty (uncredited) en la película.
Ronald Leigh-Hunt interpreta a 2nd Editor (uncredited) en la película.
Richard Marner hace el papel de Russian Officer Cornered by Max Easton (uncredited).
William Mervyn hace el papel de Capt. Balfour (uncredited).
Andre Mikhelson interpreta a 2nd Russian Officer (uncredited) en la película.
John More interpreta a American General at Embassy Party (uncredited) en la película.
Dickie Owen hace el papel de 2nd Policeman (uncredited).
Frederick Piper interpreta a Hall Porter (uncredited) en la película.
Pat Ryan interpreta a Nightclub Patron (uncredited) en la película.
Stanley Zevic interpreta a 1st Russian Officer (uncredited) en la película.
Capítulo disponible en las siguientes plataformas:
