Cast
Robert Flemyng
Cmdr. John Larkin
Basil Dignam
Lt. Cmdr. Evans at P.R.O. (uncredited)
Rachel Gurney
Clara Holland
MacDonald Parke
Jason Parrish (as Macdonald Parke)
Mavis Villiers
Adele Parrish
Ronald Leigh-Hunt
2nd Editor (uncredited)
Richard Marner
Russian Officer Cornered by Max Easton (uncredited)
Harry Andrews
Capt. Graham
John Horsley
1st Editor (uncredited)
Martin Stephens
John Holland
Junia Crawford
Susan
Roger Maxwell
Club Member
Pat Ryan
Nightclub Patron (uncredited)
James Mason
Cmdr. Max Easton
George Sanders
Sir Charles Holland
Oliver Johnston
Minister
Peter Barkworth
Sub Lt. Brown
Ernest Clark
Cmdr. Bates
Barbara Hicks
Miss Price (uncredited)
John Le Mesurier
Head of the Admiralty (uncredited)
Donald Bisset
Club Member
Desmond Roberts
Club Member
Gordon Harris
2nd Special Branch Man Jones (uncredited)
Frederick Piper
Hall Porter (uncredited)
Charles Carson
Robert Holland
Vera Miles
Virginia Killain
Duncan Lamont
1st Special Branch man Gregson
William Mervyn
Capt. Balfour (uncredited)