 Alastair SimProfessor Ernst Kronak | Professor Ernst Kronak |
 Fred EmneySir George Denberry-Baxter | Sir George Denberry-Baxter |
 Edward RigbyTimmy Tiverton | Timmy Tiverton |
 Oliver WakefieldSir Reginald Foxfield | Sir Reginald Foxfield |
 Patricia RocHope Ollerton | Hope Ollerton |
| AAnnie EsmondLady Foxfield | Lady Foxfield |
 Marian SpencerLady Shepshod | Lady Shepshod |
| OOlive SloaneDaisy Barley | Daisy Barley |
 Maire O'NeillMrs. Mitterley | Mrs. Mitterley |
 Gus McNaughtonKetley | Ketley |
 Charles HawtreyYoung Orton | Young Orton |
 Peter GawthorneMajor Shiptonthorpe | Major Shiptonthorpe |
 Aubrey MallalieuCommander Spofforth | Commander Spofforth |
 G.H. MulcasterInspector | Inspector |
 Wally PatchSam | Sam |
| HHorace KenneyWalter Shepton | Walter Shepton |
 Morris HarveyJim Flagg | Jim Flagg |
| IIda BarrKatie | Katie |
| SSpencer TrevorColonel Hazelhead | Colonel Hazelhead |
 Peter UstinovDr. Bentika | Dr. Bentika |
 Robert AtkinsHassock | Hassock |
 Diana BeaumontSecretary | Secretary |
 Syd CrossleyUncle Alfred | Uncle Alfred |
 A. Bromley DavenportAgent | Agent |
| CCharles DoeMayor | Mayor |
| AAlexander FieldPackles Junior | Packles Junior |
 Ian FlemingUnited Plastics Barrister | United Plastics Barrister |
| RRichard GeorgeTom Largs | Tom Largs |
| LLeopold GlasspoolePelham | Pelham |
 Michael Martin HarveyHandover | Handover |