I'm enjoying Humans more with each episode. I like the easy Asimov references. I like the way different characters get to show new depths or aspects of their personality each week - and the way, each week, we get a more disturbing version of what synths can do, whether limited to their original programme like NHS droid Vera (Rebecca Front) or whether illegally modded or freed like Niska (Emily Berrington). Last week Niska discovered she could kill - this week she makes her bid for freedom and starts to explore the world. It turns out she has some scruples, or at least limits on what she's prepared to do. Emily Berrington as Niska Anita (Gemma Chan) is still the central character. It's becoming clear how good she is at lying and manipulating her owners - but she's different from the other synths, and when Mattie (Lucy Carless) tries to hack into her system, just for a few seconds we get a hint of what she really is. It's compelling viewing, gradually building into a ...