 Conrad VeidtCaptain Ernst Hardt | Captain Ernst Hardt |
 Sebastian ShawAshington | Ashington |
 Valerie HobsonThe School Mistress | The School Mistress |
 Marius GoringLieutenant Felix Schuster | Lieutenant Felix Schuster |
 June DuprezAnne Burnett | Anne Burnett |
 Athole StewartThe Rev. Hector Matthews | The Rev. Hector Matthews |
| AAgnes LauchlanMrs. Matthews | Mrs. Matthews |
 Helen HayeMrs. Sedley | Mrs. Sedley |
 Cyril RaymondThe Rev. John Harris | The Rev. John Harris |
| GGeorge SummersCaptain Ratter | Captain Ratter |
 Hay PetrieEngineer | Engineer |
| GGrant SutherlandBob Bratt | Bob Bratt |
 Robert RendelAdmiral | Admiral |
 Mary MorrisChauffeuse | Chauffeuse |
| MMargaret MoffattKate | Kate |
| KKenneth WarringtonCommander Denis | Commander Denis |
 Torin ThatcherSubmarine Officer | Submarine Officer |
 Esma CannonMaggie | Maggie |
 Cyril ChamberlainBit Part (uncredited) | Bit Part (uncredited) |
 Bryan HerbertCorporal Guarding POW's on Ferry | Corporal Guarding POW's on Ferry |
 Skelton KnaggsGerman Sailor looking for Capt. Hardt | German Sailor looking for Capt. Hardt |
 Howard Marion-CrawfordGerman Officer in Kieler Hof Hotel | German Officer in Kieler Hof Hotel |
 Bernard MilesHans - Hotel Receptionist | Hans - Hotel Receptionist |
 John PenroseNewlywed at Kiel Hotel | Newlywed at Kiel Hotel |
 Johnnie SchofieldArmed Guard of POWs on Ferry | Armed Guard of POWs on Ferry |
| DDiana Sinclair-HallUndetermined Minor Role (uncredited) | Undetermined Minor Role (uncredited) |
 Graham StarkBell Boy (uncredited) | Bell Boy (uncredited) |
 Jack LambertPassport Official (uncredited) | Passport Official (uncredited) |
| JJeanne MacintyreGerman Girl (uncredited) | German Girl (uncredited) |
| JJack SharpNot listed | Not listed |
