Alastair Sim, Judy Campbell, Trevor Howard, Hattie Jacques
In a rural English hospital during WWII, a postman dies on the operating table. One of the nurses states that she has proof of who the murderer is. The facetious Inspector Cockrill suspects one of the five doctors and nurses who were in the operating theater to be the assassin. But four poisonous pills have disappeared....—Jean-Marie Berthiaume