Monsieur Héroulade

In the Tommy and Tuppence short story The Crackler, Monsieur Héroulade is the father of Marguerite Laidlaw. As the police suspect that the currency counterfeiting operation might be in France, and he made frequent visits there, he was considered a plausible suspect. Inspector Marriot asked Tommy and Tuppence to watch him.

Portrayals
In LWT's 1984 adaptation of the story (Episode 10 of Agatha Christie's Partners in Crime), the character is played by Lawrence Davidson. Tommy and Tuppence note that he always seems to be beside Major Laidlaw. Only later does Albert Batt tell them that Laidlaw is blind and Monsieur Héroulade is with him in order to help him.