Alan begins by uncovering the clues behind the greatest crime writer of all time on Burgh Island and at Greenway House and investigates what really happened in her much-publicised disappearance.
In London and Devon, Alan goes on the trail to get to know the real Miss Marple and finds out what inspired Agatha to create the famous silver-haired sleuth.
Alan's journey to discover his literary hero comes to an end, as he investigates the inimitable detective, Hercule Poirot. In London, Alan is joined by Judge Robert Rinder , as they take part in an immersive production of 'Witness for the Prosecution'.