William HoldenCapt. David Ross Trevor HowardCapt. Chris Ford Beatrix LehmannHousekeeper John CrawfordAmerican Captain Jameson ClarkEnglish Captain Guy StandevenPoliceman (uncredited) Keith FaulknerSignalman (uncredited) Michael CaineSeaman (uncredited) Bart AllisonSeaman on W88 (uncredited) BelitaCanteen Hostess (uncredited) Pauline ChamberlainWoman Dancing at Forces Centre (uncredited) Renée HoustonCanteen Worker (uncredited) Richard NellerOfficer in Operations Room (uncredited) Ernie RiceOfficer in Operations Room (uncredited) Robert RiettiDubbing (voice) (uncredited) John TathamSalvage Unit Captain (uncredited) Reg ThomasonSoldier at Dance (uncredited) Carl ForemanWriter / Producer Aubrey BaringAssociate Producer Wilfred ShingletonProduction Design Geoffrey DrakeArt Direction Oswald MorrisDirector Of Photography Beatrice DawsonCostume Design Malcolm ArnoldOriginal Music Composer 
