When American writer Mark Halliday (Cummings) begins a relationship with the very married Margot Wendice (Kelly) in London, he unknowingly sets off a chain of blackmail and murder.

ENGADGET: Hitchcock classics Dial M for Murder (3D) and Strangers on a Train come to Blu-ray October 9th

His mistake was admitting to a relative that a key piece of evidence found at the murder scene - a gold chain - was, in fact, his.

BBC: The horrors of No.9 Kelvin Road

The chain of causation that is said to lead from Palestine to the decision of a terrorist to murder young partygoers in Bali is not going to be easy to interrupt by making an adjustment in diplomacy.

ECONOMIST: Bali, Iraq and now a nuclear North Korea