 George FormbyGeorge Hepplewhite | George Hepplewhite |
 Phyllis CalvertMary Wilson | Mary Wilson |
 Garry MarshMendez | Mendez |
 Romney BrentSlim Selwyn | Slim Selwyn |
 Bernard LeeOscar | Oscar |
 Coral BrowneIris | Iris |
 Helena PickardOscar's Wife | Oscar's Wife |
| PPercy WalshSchwartz, Spy Chieftain | Schwartz, Spy Chieftain |
 Diana BeaumontGreta, Hotel Receptionist | Greta, Hotel Receptionist |
 Torin ThatcherU-Boat Commander | U-Boat Commander |
 Donald CalthropFrederick Strickland | Frederick Strickland |
| HHal GordonAlf Arbuckle, Dinky Do | Alf Arbuckle, Dinky Do |
 Johnnie SchofieldSolicitous Steward | Solicitous Steward |
| DDaniel BrownBaker (uncredited) | Baker (uncredited) |
 Alec ClunesOfficer (uncredited) | Officer (uncredited) |
 Walter FitzgeraldDockside Policeman (uncredited) | Dockside Policeman (uncredited) |
 Ian FlemingCol. Harcourt (uncredited) | Col. Harcourt (uncredited) |
 Jack HobbsConway (uncredited) | Conway (uncredited) |
| JJames KnightPassenger On SS Macaulay (uncredited) | Passenger On SS Macaulay (uncredited) |
 Albert LievenGerman Radio Operator (uncredited) | German Radio Operator (uncredited) |
 Charles PatonSimion (uncredited) | Simion (uncredited) |
| LLloyd PearsonHotel Manager (uncredited) | Hotel Manager (uncredited) |
 Bill ShineUntipped Steward (uncredited) | Untipped Steward (uncredited) |
 Ronald ShinerMusician (uncredited) | Musician (uncredited) |
| BBen WilliamsRadio Operator On SS Macaulay (uncredited) | Radio Operator On SS Macaulay (uncredited) |
 Ian WilsonParker, Dinky Do (uncredited) | Parker, Dinky Do (uncredited) |
