Hans a young German journalist arrives in London to write an article about au-pair girls, but is requested by friends to investigate the whereabouts of their teenage daughter Greta.
| Actor | Role |
|---|---|
 Tristan RogersHans Wiemer | Hans Wiemer |
 Karen BoyesSue | Sue |
 Alan CurtisCarl Roberts | Carl Roberts |
 Robin AskwithRoger Maitland | Roger Maitland |
 Leena SkoogGreta Gruber | Greta Gruber |
 John ClivePhil the Greek | Phil the Greek |
| KKenneth HendelPercy | Percy |
| NNick ZaranJohnny Maltese | Johnny Maltese |
 Martin WyldeckHerr Schickler | Herr Schickler |
| GGodfrey KentonHerr Gruber | Herr Gruber |
 Pearl HackneyMrs. Gruber | Mrs. Gruber |
| EElizabeth BradleyMrs. Schickler | Mrs. Schickler |
 Erika RaffaelKarin | Karin |
 Felicity DevonshireSerena | Serena |
| JJane CardewKirsten | Kirsten |
 Minah BirdCynthia | Cynthia |
| CCass AllenMrs. Marks | Mrs. Marks |
 Bill MaynardBig Danny | Big Danny |
| MMarion GrimaldiAmerican | American |
| SSteve EmersonRascal | Rascal |
| RRalph BallFred Sharprock | Fred Sharprock |
| DDerek KellerFootballer | Footballer |
 Ivor SalterHotel Porter | Hotel Porter |
| MMax MasonPoliceman | Policeman |
 Richard O'BrienBalding Hippy | Balding Hippy |
 Pete WalkerWaiter | Waiter |
 Glenda AllenDancer | Dancer |