Two aspiring songwriters finally manage to sell a tune by claiming that it was composed by a reclusive musical genius. When the tune hits the top of the charts, they find themselves having to produce the "real" composer.
| Actor | Role |
|---|---|
 George ColeKen Miller | Ken Miller |
 Terence MorganRay Thompson | Ray Thompson |
 Kathleen HarrisonMiss Gilly | Miss Gilly |
 Mylène DemongeotGeorgie | Georgie |
 James HayterBert Fielding | Bert Fielding |
| TTed HeathHimself | Himself |
| DDennis LotisHimself | Himself |
 Richard WattisHarold | Harold |
 Maurice KaufmannPaul Taylor | Paul Taylor |
 Reginald BeckwithProfessional Manager | Professional Manager |
 Jon PertweeConductor | Conductor |