James Mason
Cmdr. Max Easton
George Sanders
Sir Charles Holland
Vera Miles
Virginia Killain
Robert Flemyng
Cmdr. John Larkin
Oliver Johnston
Minister
Duncan Lamont
1st Special Branch man Gregson
Harry Andrews
Capt. Graham
Peter Barkworth
Sub Lt. Brown
Rachel Gurney
Clara Holland
Martin Stephens
John Holland
Charles Carson
Robert Holland
Junia Crawford
Susan
Donald Bisset
Club Member
Desmond Roberts
Club Member
MacDonald Parke
Jason Parrish (as Macdonald Parke)
Mavis Villiers
Adele Parrish
Ernest Clark
Cmdr. Bates
Basil Dignam
Lt. Cmdr. Evans at P.R.O. (uncredited)
Gordon Harris
2nd Special Branch Man Jones (uncredited)
Barbara Hicks
Miss Price (uncredited)
John Horsley
1st Editor (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)
Frederick Piper
Hall Porter (uncredited)
William Kendall
Tom
Waveney Lee
Marcia Holland
Henry B. Longhurst
Club Member (as Henry Longhurst)
Roger Maxwell
Club Member
Gerald Case
Club Member
Reginald Smith
Club Steward
Rosemary Dorken
WREN Officer
Alexander Archdale
Local Doctor (uncredited)
Mabel Etherington
Nightclub Patron (uncredited)
Frederick Kelsey
Club Member (uncredited)
Andre Mikhelson
2nd Russian Officer (uncredited)
John More
American General at Embassy Party (uncredited)
Dickie Owen
2nd Policeman (uncredited)
Pat Ryan
Nightclub Patron (uncredited)
Stanley Zevic
1st Russian Officer (uncredited)
