Netflix’s spy thriller starring Keira Knightley, Black Doves, boasts an impressive cast of deeply talented British actors. Black Doves follows Helen Webb (Knightley), a member of the eponymous spy group based in London. Helen sells secrets she steals from her husband, Wallace (Andrew Buchan), but after her secret lover is killed, she goes on a quest for revenge. It’s far from a typical holiday movie, but Black Doves used its star-studded cast to tremendous effect.