Gerald Hemmingway

In the novel Cards on the Table, Gerald Hemmingway is a promising young actor, and a friend of Poirot. During the denouement, Poirot explains to the suspects that the murderer injected Mrs Lorrimer with a drug to cause her death, and was seen by a window cleaner by the name of Stephens. Stephens is called in, and is able to recognise the person he saw injecting something into Mrs Lorrimer's arm. Poirot later explains that he asked Gerald to play the part of Stephens.