What are the age ranges for the characters in Agatha Christie's play The Mousetrap?

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The ages of the characters in Agatha Christie's play The Mousetrap play a key role in the plot. The initial murder in the play is the revenge of a mistreated foster child, George Corrigan, for the death of his younger brother Jimmie due to neglect by their foster parents. The avenging murderer is now in his twenties, having fought as a soldier and suffered what we now might call PTSD. The characters in the play range from their early twenties to late middle age, and thus half are of the right age to be the murderer and half of the right age to be potential victims. The main characters are:

  • Mollie Ralston: Late twenties and potential target. Was a young teacher at the school George and Jimmy attended.

  • Giles Ralston: Late twenties.

  • Mrs. Boyle: Murder victim. She is a middle-aged magistrate who placed the children with their abusive foster family.

  • Leslie Margaret Katherine Casewell: Early twenties, sister of George and Jimmy.

  • Detective Sergeant Trotter: Early twenties. He is George Corrigan in disguise.

  • Major Metcalf: Middle aged. He is the real detective in disguise.

  • Christopher Wren: Army deserter in his early twenties.

  • Mr. Paravicini: Elderly smuggler.

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