 Raymond MasseyJohn Cabal / Oswald Cabal | John Cabal / Oswald Cabal |
 Edward ChapmanPippa Passworthy / Raymond Passworthy | Pippa Passworthy / Raymond Passworthy |
 Ralph RichardsonThe Boss | The Boss |
 Margaretta ScottRoxana / Rowena | Roxana / Rowena |
 Cedric HardwickeTheotocopulos | Theotocopulos |
 Maurice BraddellDr. Harding | Dr. Harding |
 Sophie StewartMrs. Cabal | Mrs. Cabal |
 Derrick De MarneyRichard Gordon | Richard Gordon |
 Ann ToddMary Gordon | Mary Gordon |
 Pearl ArgyleCatherine Cabal | Catherine Cabal |
| KKenneth VilliersMaurice Passworthy | Maurice Passworthy |
| IIvan BrandtMorden Mitani | Morden Mitani |
| AAnne McLarenThe Child | The Child |
 Patricia HilliardJanet Gordon | Janet Gordon |
 Charles CarsonGreat Grandfather | Great Grandfather |
 Patrick BarrWorld Transport Official (uncredited) | World Transport Official (uncredited) |
| NNoel BrophyIrishman (uncredited) | Irishman (uncredited) |
 John ClementsThe Airman (uncredited) | The Airman (uncredited) |
| AAnthony HollesSimon Burton (uncredited) | Simon Burton (uncredited) |
 Allan JeayesMr. Cabal (uncredited) | Mr. Cabal (uncredited) |
| PPickles LivingstonHorrie Passworthy (uncredited) | Horrie Passworthy (uncredited) |
 George SandersCelestial Body (uncredited) | Celestial Body (uncredited) |
 Abraham SofaerThe Jew (uncredited) | The Jew (uncredited) |
 Terry-ThomasMan of the Future (uncredited) | Man of the Future (uncredited) |
| GGeorge SpenceHeckling Soldier (uncredited) | Heckling Soldier (uncredited) |
