Keira Knightley is still betraying state secrets to a shadowy organization as Helen Webb, but now she’s the wife of the UK’s Prime Minister as she and best friend Sam (Ben Whishaw) battle new enemies in the second-season trailer for Netflix spy thriller Black Doves, which dropped on Thursday. As her enigmatic leader (Sarah Lancashire’s Mrs. Reed) at Black Doves gets caught up in a ruthless plot to oust her, Helen and Sam are left by series creator Joe Barton to battle another vast conspiracy that could cost them everything, including those they love. “I would like to know who the hell it is I’m risking my life, liberty and freedom for,”…