Agatha Christie - Why Didn't They Ask Evans?

Based on Agatha Christie's 1934 novel, Why Didn't They Ask Evans?

is a story of deceit, betrayal and murder that lures our young amateur detectives from the rugged coastline of north Wales to the shadowy Home Counties.

Bobby Jones and his childhood friend Frankie Derwent, reunited after a decade apart, vow to answer a dying man's final question: Why didn't they ask Evans?