There was a notorious 19th century legal case of the Tichborne Claimant, in which an English imposter, Arthur Orton, then living in Australia, claimed to be missing Tichborne family member Sir Roger Tichborne.
The series also aired a Victorian-era mystery "The Tichborne Claimant", with Gladys Cooper portraying the Roman Catholic Lady Tichborne, who seeks the whereabouts of her son, Roger Cooper, who disappeared at sea.