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?

Directed by: Fielder Cook & Ronald Neame
Written by: Hugh Mills
Runtime: 92 minutes
Tagline: A sportive look at the fertility rites (and wrongs) of Western society.
Cast:
Deborah Kerr Deborah Kerr
Prudence Hardcastle 
David Niven David Niven
Gerald Hardcastle 
Judy Geeson Judy Geeson
Geraldine Hardcastle 
Peter Butterworth Peter Butterworth
Chemist 
Robert Coote Robert Coote
Henry Hardcastle 
Irina Demick Irina Demick
Elizabeth Brett