 |
Glynis Johns as Clarissa Hailsham-Brown |
 |
John Justin as Henry Hailsham-Brown |
 |
Jack Hulbert as Sir Rowland Delahaye |
 |
Cicely Courtneidge as Miss Peake |
 |
Ronald Howard as Jeremy |
 |
David Nixon as Elgin |
 |
Wendy Turner as Pippa |
 |
Basil Dignam as Hugo |
|
Joan Sterndale-Bennett as Mrs. Elgin |
 |
Ferdy Mayne as Oliver |
 |
Peter Butterworth as Insp. Lord |
 |
Anton Rodgers as Sgt. Jones |
|
Robert Raglan as Dr. Berry |
| Writing | Albert G. Miller | Writer |
| Writing | Eldon Howard | Writer |
| Directing | Godfrey Grayson | Director |
| Camera | James Wilson | Director of Photography |
| Sound | Tony Crombie | Original Music Composer |
| Production | Edward J. Danziger | Producer |
| Production | Harry Lee Danziger | Producer |
| Costume & Make-Up | Elsie Alder | Hairstylist |
| Editing | Bill Lewthwaite | Editor |
| Art | Norman G. Arnold | Art Direction |
| Costume & Make-Up | Aldo Manganaro | Makeup Artist |
| Writing | Agatha Christie | Theatre Play |
| Art | Peter Russell | Assistant Art Director |
| Writing | Agatha Christie | Story |
