Kadro (35)
Clive BrookCaptain Tom Armitage
John ClementsLieutenant Cranford
Edward ChapmanCaptain Eckersley
Judy CampbellLucy Armitage
Penelope Dudley-WardMabel
Edward RigbyMr. Matthews
Allan JeayesCommander Blount
Michael WildingDot
Harold WarrenderLt. Commander Martin
David HutchesonCaptain Sandeman
George CarneyBatesAl MillenKnowles
Charles FarrellWalker
John LaurieGates
George BensonParker
Hay PetrieMinesweeper Skipper
Mervyn JohnsHis Mate
Albert LievenCommander U.37
John WengrafCommander Deutschland
Edward LexyMerchantman Skipper
John Glyn-JonesMateJohn BoxerGerman CaptainJohn CarolEdmonds
Alec ClunesBit Part
Anton DiffringU-Boat OfficerDerek ElphinstoneHawkinsAlf GoddardBosun's Mate
Stewart GrangerSutton
Bryan HerbertSignals Yeoman
Patrick HoltHoltJames KnightAdmiral
Maire O'NeillMary HoganCharles RolfePeacock - Wardroom StewardHarry TerrySailorCharles Williams'Shorty' Howard