Many shades of grey

Good people don't always carry a halo above their heads and, conversely, bad people don't always have two devilish horns. That is one of the key themes in Killing Eve, a disturbingly dark web series that has launched its third season. The two protagonists are a psychopathic woman who kills people with alarming frequency, and a detective who's hot on her trail. But the lines are often blurred between right and wrong.