Katherine is a fictional character portrayed by Georgina Rylance in the TV series Agatha Christie's Poirot.
In the first episode they appeared in, titled The Mystery of the Blue Train (season 10), they were 26 years old.
They appear in 1 episodes out of a total of 70 aired
Episodes1
The Mystery of the Blue Train
episode S10.E1 december 2005Poirot investigates the brutal murder of an American heiress and the theft of a fabulous ruby on the Blue Train between Calais and Nice.