 Carol MarshSusan Graham | Susan Graham |
 David TomlinsonNick Martin | Nick Martin |
 Mervyn JohnsErnest Bennett | Ernest Bennett |
 Richard HearneProfessor Pastry | Professor Pastry |
 Terry-ThomasSelf | Self |
 Jimmy EdwardsDr. Edwards | Dr. Edwards |
 Peter HammondSpencer Stone | Spencer Stone |
 Jon PertweeHeadwaiter | Headwaiter |
 Wilfrid Hyde-WhiteDr. B. Jekyll | Dr. B. Jekyll |
 Peter HaddonMajor Basil Beagle | Major Basil Beagle |
 Geoffrey SumnerHumphrey Beagle | Humphrey Beagle |
 Zena MarshallGiselle | Giselle |
 Colin GordonChadbeater Longwick | Chadbeater Longwick |
 Judith FurseMrs. Martin | Mrs. Martin |
 Edmund WillardEzekial | Ezekial |
| RRobert LamouretThe 'Duck' Man | The 'Duck' Man |
 Henry KendallLord Bruce Carlton | Lord Bruce Carlton |
 Bill FraserOliver Cromwell | Oliver Cromwell |
 Shirl ConwayCabaret Star | Cabaret Star |
 George BensonTemporary Waiter | Temporary Waiter |
 Sandra DorneReceptionist | Receptionist |
 Patricia RaineAmber | Amber |
 Ronald AdamDirector General of the BBC (uncredited) | Director General of the BBC (uncredited) |
 Michael BalfourBarman (uncredited) | Barman (uncredited) |
 Johnny BriggsBBC Page Boy (uncredited) | BBC Page Boy (uncredited) |
 Esma CannonAutograph Huntress (uncredited) | Autograph Huntress (uncredited) |
 Cyril Chamberlain(uncredited) | (uncredited) |
 Andrew CrawfordFirst BBC Announcer (uncredited) | First BBC Announcer (uncredited) |
 Valentine DyallMan Telling Story at BBC (uncredited) | Man Telling Story at BBC (uncredited) |
 Danny GreenLiftman (uncredited) | Liftman (uncredited) |
