Agatha Christie's famous murder mystery The Witness For The Prosecution is being adapted for BBC One.
The new two-part adaptation of Agatha's short story will be written by Sarah Phelps, who penned the TV version of JK Rowling's A Casual Vacancy and the successful And Then There Were None adaptation at Christmas.
The thriller follows the bloody murder of society heiress Emily French in 1920s London.
All the evidence points to Leonard Vole, a young chancer to whom the heiress left her vast fortune and who ruthlessly took her life. At least, this is the story that Emily's dedicated housekeeper Janet Mackenzie stands by in court.
But Leonard is adamant that his partner, Romaine, can prove his innocence.
Sarah said: "The Witness For The Prosecution is a compelling story of deceit, desire, murder, money and morality, innocence and guilt, heartbreak and - most painful and dangerous of all - love.
"At the centre of this dark and tangled net is the astonishing character of Romaine, a noir heroine for all our times."
Julian Jarrold, the man behind Appropriate Adult, will direct.
No casting has been announced yet nor an expected air date.