S11E04 - Taken at the Flood

While visiting the Coronation Club during an air-raid alarm in 1944, Hercule Poirot hears Major Porter talking about Gordon Cloade, who has been killed along with almost his entire household during the Blitz. He has been survived only by his young widow, Rosaleen, and her brother, but there is a complication. Apparently, Porter knew Robert Underhay, the widow's first husband, in Africa, and remembers his suggesting that he would deliberately disappear in order to set her free from the marriage without the shame of a divorce. Before his disappearance, Underhay joked that he will subsequently adopt the name "Enoch Arden" in homage to the poem by Tennyson with a similar theme. Overhearing the same anecdote, Gordon's older brother, Jeremy, storms out angrily.

Two years later, in 1946, Poirot is visited by Katherine Cloade, who wishes him to investigate the whereabouts of Robert Underhay, evidently with a view to breaking the will. He refuses, but later notices the death notice of someone called Enoch Arden, who has died in the same village where the Cloade family lives.