- Laurence Olivier
- Tony McVane
- Ralph Richardson
- Major Charles Hammond
- Valerie Hobson
- Kay Hammond
- George Curzon
- Jenkins
- George Merritt
- Barrett
- Gus McNaughton
- Blenkinsop
- David Tree
- Robert Mackenzie
- Sandra Storme
- Daphne
- Hay Petrie
- Stage Door Keeper
- Frank Fox
- Karl
- George Butler
- Air Marshall Gosport
- Gordon McLeod
- The Baron
- John Longden
- Peters
- Ronald Adam
- Pollack - Aviation Engineer
- Patrick Aherne
- Officer
- Eileen Bennett
- Minor Role
- Wallace Bosco
- Bit part
- Leslie Bradley
- Major Hammond's Assistant
- Henry Caine
- Minor Role
- Noel Dainton
- Northern Salvage Company employee
- Mark Daly
- John - Factory Watchman
- Roy Emerton
- Viking First Mate
- Derek Farr
- Minor Role
- David Farrar
- Viking Bo'sun
- Ian Fleming
- Air Ministry Officer
- Morland Graham
- Captain of the Viking
- Sally Gray
- Minor Role
- Alastair Hunter
- E131 Co-pilot
- Allan Jeayes
- Minor Role
- Colin Keith-Johnston
- Tower Controller
- Franklyn Kelsey
- Inspector
- John Laurie
- Newspaper Editor
- Herbert Lomas
- Mattie - Fisherman
- Raymond Lovell
- Northern Salvage Company Manager
- Miles Malleson
- Bit part
- Gertrude Musgrove
- Barmaid
- Reginald Purdell
- Pilot
- John Robinson
- Navigator of E131
- John Singer
- Newspaper Boy
- Lewis Stringer
- Foreign Agent
- Gregory Stroud
- Stroud - Aviation Engineer
- Jack Vyvyan
- Police Sgt
- Hal Walters
- Cornish Car Driver
