Poirot and Hastings are at Lake Windermere for an attempt on the world speed-boat record. Two sisters have premonitions of danger. Soon a rich elderly widow is hurt by falling down stairs, then later she ishuged by poisoning with phosphorus. The "dumb witness" Poirot must fathom to solve the mystery is a dog.

Agatha Christie's Poirot Season 6 Episodes...

• s06e01 - Hercule Poirot's Christmas
• s06e02 - Hickory Dickory Dock
• s06e03 - Murder on the Links
• s06e04 - Dumb Witness

Agatha Christie's Poirot Show Summary

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.