Mrs Mallaby is a fictional character portrayed by Kate Harper in the TV series Agatha Christie's Poirot.
They appear in 1 episodes out of a total of 70 aired
Episodes1
The Affair at the Victory Ball
episode S3.E10 march 1991Poirot and Hastings attend the Victory Ball, a popular costume party. During the festivities, one of the guests is found stabbed to death, and another succumbs to a drug overdose the next day.