Poirot

Four feature-length cases. In Three Act Tragedy, a vicar dies at a dinner thrown by actor Sir Charles Cartwright, and Poirot finds Cartwright himself is the killer. In Hallowe'en Party, a girl brags at a party that she once saw a murder and is drowned in an apple-bobbing tub; Ariadne Oliver calls Poirot, and the killers are Rowena Drake and gardener Michael Garfield. In Murder on the Orient Express, Poirot, here a Catholic tormented by questions of justice, proves the passengers jointly killed little Daisy Armstrong's murderer and painfully accepts their lie. In The Clocks, a body turns up in a room full of clocks, in the middle of a spy plot.

1. CameoJessica Chastain and Toby Jones on board

   ITV's 2010 Murder on the Orient Express has Jessica Chastain and Toby Jones among the passengers.

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2. Behind the scenesThe train that waited for Christmas

   Murder on the Orient Express was meant to open the series but was held for Christmas 2010. The Clocks got moved too and didn't air until December 2011.

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3. Behind the scenesThe theme gets upbeat strings

   Over the end credits of Hallowe'en Party and The Clocks, Christopher Gunning's theme plays in a brighter string arrangement.

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