In The Witness for the Prosecution, Leonard Vole stands on trial for the murder of Mrs Emily French.
Using the story's original period, Vole is seen as a soldier in The Great War trying fight in the hell-zone of the battlefield. After the War, he works as a Waiter at a cocktail bar with other handsome ex soldiers, but after tripping and spilling drinks, he is fired and Mrs French takes him home. Vole begins a physical relationship with Emily, Janet McIntyre doesn't hide her distaste of him, telling him that Emily would get tired of him, he tells her if she thinks that she doesn't know her mistress. After she is found dead Vole was arrested in from his bed. When he speaks to John Mayhew about his “wife” as the only person to help him it’s clear that Mayhew wants to help him due to his youth. At the trial Romaine leads the prosecution with her claim that Vole was not at the time he claims and so he shouted, as the executor and Janet give their testimony things are looking bleak, but the next day Sir Charles exposes the letters Romaine wrote to her secret lover and that she lied to him about being single. After this Sir Charles goes through the others untying their statements leaving Vole acquitted at the end.
After John collapsed just as Vole was to congladtants him, Vole pays for his time at the hospital, they met again when John is on holiday in France Vole is staying at the same hotel with his bride who turned out to be Romaine with Red Hair, forcing Mayhew in they reveal that they conspired to kill French and give Leonard an alibi by presenting Romaine as a cold woman, as Mayhew leaves calling Leonard a monster the couple remark that he is the greater monster for sending the younger generation off to die, or be damaged, also he convinced everyone that Janet did it and now she's dead to make matters worst Vole was going to give her money. When they go out later on Vole jokes to Romaine about her getting tired of him and she replied don't be tiresome which leaves him bemused.
He was played by Billy Howle.