James Mason
Cmdr. Max Easton
George Sanders
Sir Charles Holland
Vera Miles
Virginia Killain
Robert Flemyng
Cmdr. John Larkin
Duncan Lamont
1st Special Branch man Gregson
Harry Andrews
Capt. Graham
Peter Barkworth
Sub Lt. Brown
Rachel Gurney
Clara Holland
Martin Stephens
John Holland
Waveney Lee
Marcia Holland
Charles Carson
Robert Holland
Henry B. Longhurst
Club Member (as Henry Longhurst)
Desmond Roberts
Club Member
Reginald Smith
Club Steward
Rosemary Dorken
WREN Officer
MacDonald Parke
Jason Parrish (as Macdonald Parke)
Mavis Villiers
Adele Parrish
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)
