http://www.pbs.org/masterpiece/mystery Sunday, July 3, 2011 at 9pm ET on PBS Ariadne Oliver (Zoe Wanamaker, Harry Potter) returns to join forces with Poirot to investigate a drowning at a Hallowe'en Party. As they look further, they uncover a series of mysterious deaths in the village that could be connected. Adapted by Mark Gatiss (Sherlock).
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