Mystery film based on an Agatha Christie play. An ambassador's wife must hide the corpse of her stepdaughter's unlikeable stepfather from her husband, who is bringing important visitors to their country home.
| Actor | Role |
|---|---|
 Glynis JohnsClarissa Hailsham-Brown | Clarissa Hailsham-Brown |
 John JustinHenry Hailsham-Brown | Henry Hailsham-Brown |
 Jack HulbertSir Rowland Delahaye | Sir Rowland Delahaye |
 Cicely CourtneidgeMiss Peake | Miss Peake |
 Ronald HowardJeremy | Jeremy |
 David NixonElgin | Elgin |
| WWendy TurnerPippa | Pippa |
 Basil DignamHugo | Hugo |
| JJoan Sterndale-BennettMrs. Elgin | Mrs. Elgin |
 Ferdy MayneOliver | Oliver |
 Peter ButterworthInsp. Lord | Insp. Lord |
 Anton RodgersSgt. Jones | Sgt. Jones |
 Robert RaglanDr. Berry | Dr. Berry |