A strait-laced British banker hires an eccentric private detective to follow his free-spirited American wife, whom he suspects is cheating on him.
| Actor | Role |
|---|---|
 Mia FarrowBelinda | Belinda |
 Chaim TopolJulian Cristoforou | Julian Cristoforou |
 Michael JaystonCharles | Charles |
 Margaret RawlingsMrs. Sidley | Mrs. Sidley |
 Annette CrosbieMiss Framer | Miss Framer |
 Dudley FosterMr. Mayhew | Mr. Mayhew |
 Michael AldridgeSir Philip Crouch | Sir Philip Crouch |
| MMichael BarringtonMr. Scrampton | Mr. Scrampton |
 Neil McCarthyParkinson | Parkinson |
 David BattleyWriter (uncredited) | Writer (uncredited) |
| EErnest BlythParty Guest (uncredited) | Party Guest (uncredited) |
 James CossinsParty Guest (uncredited) | Party Guest (uncredited) |
 Guy StandevenMan at Concert (uncredited) | Man at Concert (uncredited) |
 James VilliersDinner Guest (uncredited) | Dinner Guest (uncredited) |
 Douglas WilmerParty Guest (uncredited) | Party Guest (uncredited) |
 Brian WorthParty Guest (uncredited) | Party Guest (uncredited) |