Based on the 1925 story of the same name by Marie Belloc Lowndes (The Lodger, etc.), this 19 August 1952 episode of Suspense features a wealthy bride beginning to wonder about the fate of her husband's prior fiance. Costars are Arlene Francis and Lloyd Bridges. Steve Haste states in Criminal Sentences that the Patrick Mahon case is the basis for the story; the married Mahon killed his pregnant girlfriend Emily Kaye in 1924 and was hanged.
Note that there is a new collection of Lowndes's short stories, A Monstrous Regiment of Women, that is edited by past Clues contributor Elyssa Warkentin and is published by Cambridge Scholars Publishing.