- Conrad Veidt
- Capt. Andersen
- Valerie Hobson
- Mrs. Sorensen
- Hay Petrie
- Axel Skold / Erik Skold
- Joss Ambler
- Lt. Cmdr. Ashton, RNR
- Raymond Lovell
- Van Dyne
- Esmond Knight
- Mr. Pidgeon
- Charles Victor
- Hendrick
- Phoebe Kershaw
- Miss Lang
- Harold Warrender
- Lt. Cmdr. Ellis, RN
- John Longden
- Passport Officer
- Eric Maturin
- Passport Officer
- Paddy Browne
- Singer in 'Regency'
- Henry Wolston
- First Danish Waiter
- Julian Vedey
- Second Danish Waiter
- Sidney Monckton
- Third Danish Waiter
- Hamilton Keene
- Fourth Danish Waiter
- Leo Genn
- First Brother Grimm
- Stuart Latham
- Second Brother Grimm
- Peter Bull
- Third Brother Grimm
- Dennis Arundell
- Lieman
- Molly Hamley-Clifford
- Baroness Hekla
- Eric Berry
- Mr. Abo
- Olga Edwardes
- Mrs. Abo
- Toni Gable
- Miss Karoly
- Desmond Jeans
- First Karoly
- Eric Hales
- Second Karoly
- J.P. Roberts
- Hanson
- Manning Whiley
- Manager of 'Mousetrap'
- Deborah Kerr
- Cigarette Girl
- Frank Allenby
- (uncredited)
- Patrick Barr
- Undetermined Role
- Esma Cannon
- Erik Skold's Niece
- Albert Chevalier
- (uncredited)
- Erik Chitty
- Cloakroom Attendant
- Mark Daly
- Taxi Driver
- John England
- (uncredited)
- Erik
- Spaniel
- Cameron Hall
- Naval Officer
- Haddon Mason
- (uncredited)
- Bernard Miles
- Man Lighting Pipe
- Milo O'Shea
- Air Raid Warden
- Nicholas Phipps
- Man in Car
- Duncan Ross
- (uncredited)
- Johnnie Schofield
- Waiter at the Cab Drivers Shelter
- Michael Shepley
- Man in Club
- Paddy Smith
- Waiter
- Spangle
- Spaniel
- Torin Thatcher
- Sailor
- Townsend Whitling
- Official in Bow-tie
- Ben Williams
- Man Selling Torches
