Adeel Akhtar, Tracey Ullman, Finn Bennett and Luther Ford have joined Keira Knightley and Ben Whishaw on the cast of cast of Netflix's 'Black Doves.'

Set against the backdrop of London at Christmas, “Black Doves” follows Helen Webb (Knightley), a quick-witted, down to earth, dedicated wife and mother — and professional spy. For 10 years, she’s been passing on her politician husband’s secrets to the shadowy organisation she works for: the Black Doves.