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Margaret Lockwood as Clarissa Hailsham-Brown |
 |
Felix Aylmer as Sir Rowland Delahaye |
 |
Myles Eason as Jeremy Warrender |
|
Harold Scott as Hugo Birch |
 |
Campbell Singer as Inspector Lord |
 |
Desmond Llewelyn as Constable Jones |
|
Sidney Monckton as Elgin |
 |
Judith Furse as Mildred Peake |
|
Charles Morgan as Oliver Costello |
| Writing | Agatha Christie | Screenplay |
| Directing | Wallace Douglas | Director |
