K.J. Yossman Keira Knightley is set to star in Netflix series “Black Doves,” the streamer unveiled today. Written by “Giri/Haji” showrunner Joe Barton, the drama will see Knightley star as Helen, a woman with a secret identity who embarks on a passionate affair. When her lover falls victim to London’s shadowy underworld, Helen’s employers send an old friend, Sam, to protect her. The two of them soon embark on a high octane adventure set against a backdrop of diplomatic tension and Christmas. “‘Black Doves’ is the story of two old friends coming back together, finding trust in one another in a world where trust can get you killed and, ultimately, changing the course of each other’s lives forever,” reads the logline.