The New Mrs Devlin

In this episode of The Whistler, Kenneth Devlin plans to poison his wife Emily with the intention of marrying his lover Laurel. However, when he believes that Laurel has betrayed him to the sheriff, he plans to pin the murder on his housekeeper, Frieda. But when Frieda is found dead from the same poison, Devlin's plans unravel and he is confronted by the sheriff, ultimately facing the consequences of his actions.