Sunshine Slayings

Edith & Joseph (1x11)

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Edith Hallock and Joseph Michel, two affluent New York seniors, fly to glamorous Acapulco to mix with the glitterati - and disappear without a trace. Police search high and low with a growing sense of dread. But when a family member rushes from home to assist in the search, the letters she received about the couples' travel provides the clue that cracks the case.