Agatha Christie's ingenious murder mystery, now a sensational two-part thriller broadcast over Christmas on BBC One.

Starring David Jonsson as Fitzwilliam, alongside Morfydd Clark as Bridget; Penelope Wilton as Miss Pinkerton, Tom Riley as Lord Whitfield, Douglas Henshall as Major Horton, Mathew Baynton as Dr Thomas, Mark Bonnar as Reverend Humbleby and Tamzin Outhwaite as Mrs Pierce.

In a quiet English village, a killer is about to strike. Again and again.

Luke Fitzwilliam found it hard to credit Miss Pinkerton's wild allegation that a multiple murderer was at work in the quiet English village of Wychwood - or her speculation that the local doctor was next in line.

But within hours, Miss Pinkerton had been found dead. Crushed by a passing car. Mere coincidence? Luke was inclined to think so - until another victim is found dead.