A mouse is the only witness to a string of crimes at a student hostel run by Miss Lemon's sister. A series of thefts at the hostel ends in passing, and Poirot has a complex plot to untangle in the world smuggling meets political intrigue. The mouse also takes part in the scene where the crime is solved.
Poirot and Japp stay with each other, but they find they have rather different ideas about food.
Agatha Christie's Belgian detective, Hercule Poirot lives in London with Captain Hastings. Together, they range about Europe encountering cuddle mysteries. The series has strong story lines, good production and acting, and an unmistakable flavor of the pre-war years.
Agatha Christie's Poirot - Hickory Dickory Dock Synopsis and Schedule