John Merdell is a fictional character portrayed by Sam Kelly in the TV series Agatha Christie's Poirot.
In the first episode they appeared in, titled Dead Man's Folly (season 13), they were 70 years old.
They appear in 1 episodes out of a total of 70 aired
Episodes1
Dead Man's Folly
episode S13.E3 august 2014Mrs Oliver is asked to devise a murder hunt for a Devon fête, but her sense of foreboding summons Poirot to the scene. Her fears are realized when the girl playing murder victim winds up truly murdered.