Conrad VeidtOtto Becker / Baron Hugo von Detner Ivan F. SimpsonProfessor Sterling (as Ivan Simpson) Martin KosleckKurt Richten Sidney BlackmerArnold Milbar Pierre WatkinGrover Blaine McHenry Ernie AlexanderSailor (uncredited) Rudolph AndersCab Driver (uncredited) Jessie ArnoldLandlady (uncredited) Walter BaconSpy (uncredited) Polly BaileyFat Woman (uncredited) Roy BarcroftChief Petty Officer (uncredited) Barbara BedfordWoman (uncredited) Arthur BelascoDetective (uncredited) Walter ByronOfficer (uncredited) Baldwin CookeWaiter (uncredited) Hal CookeClerk (uncredited) Clyde CourtrightDoorman (uncredited) Stuart CrawfordCommentator (voice) (uncredited) Jack DaleyReporter (uncredited) Mark DanielsCab Driver (uncredited) Cliff DanielsonYouth (uncredited) Jack DeeryDiplomat (uncredited) Drew DemorestReporter (uncredited) Harry DennyRestaurant Patron (uncredited) Herschel GrahamReporter (uncredited) Bernadene HayesRosie (uncredited) Edward HearnReporter (uncredited) Robert Homans1st Captain (uncredited) Carl M. LevinessOnlooker at Departure (uncredited) Wilbur MackReporter (uncredited) George MagrillThug (uncredited) Frank MarloweSailor (uncredited) Charles MeakinRestaurant Patron (uncredited) James MillicanOperator (uncredited) Roger MooreMessenger (uncredited) George NoisomBellboy (uncredited) William Post Jr.Harry (voice) (uncredited) Paul PowerRestaurant Patron (uncredited) Christian RubMohr (uncredited) Buck RussellRestaurant Patron (uncredited) Tim RyanOfficer (uncredited) Jeffrey SayreRestaurant Patron (uncredited) Charles SherlockDetective (uncredited) Russell Simpson2nd Captain (uncredited) Harry StaffordElderly Man (uncredited) Hermine SterlerMrs. Mohr (uncredited) Tom StevensonHeadwaiter (uncredited) Brick SullivanRadio Operator (uncredited) Ray TealOfficer Graves (uncredited) Philip Van ZandtThug (uncredited) Roland VarnoBauer (uncredited) Duke YorkSailor (uncredited) Jeff YorkKeeler (uncredited) Joe YuleBarney (uncredited) Joe GilbertSubmarine Radioman (uncredited) Paul GangelinSceneggiatura John Meehan Jr.Sceneggiatura Cedric GibbonsArt Direction Edwin B. WillisSet Decoration Harry Stradling Sr.Director Of Photography Howard ShoupCostume Design Sydney GuilaroffHairstylist Daniele AmfitheatrofMusica Joseph NussbaumOrchestrator Lennie HaytonCompositore Musicale Originale Douglas ShearerSound Director 
