

92 minutes
5/23/1968
Prudence Hardcastle is on the pill. So is her sister-in-law, but someone has been swapping aspirin for their pills. Is it the teenage niece, the maid, the chauffeur, a lover, Prudence's husband Gerald, or all of the above?

Deborah Kerr
as Prudence Hardcastle

David Niven
as Gerald Hardcastle

Robert Coote
as Henry Hardcastle

Irina Demick
as Elizabeth Brett

Joyce Redman
as Grace Hardcastle

Judy Geeson
as Geraldine Hardcastle

Keith Michell
as Dr. Alan Huart

Edith Evans
as Roberta Bates

David Dundas
as Tony Bates

Vickery Turner
as Rose
Hugh Armstrong
as Ted

Peter Butterworth
as Chemist

Moyra Fraser
as Woman in Tea Shop

Annette Kerr
as Gerald's Secretary

Harry Towb
as Racetrack Official

Jonathan Lynn
as Chemist's Assistant
Ivor Dean
as City Banker in Taxi Cab (uncredited)

Arthur Hewlett
as Mr. Ferguson (uncredited)

Michael Hordern
as Dr. Morley (uncredited)
John Tatham
as Man Sitting in Grandstand at the Races (uncredited)
Joseph Tregonino
as Waiter (uncredited)