Really unrealistic. People don't just 'turn into' murderers with no history of psychosis. Also, where are all the CCTV cameras? The first two killings she does, up against two grown men by the way, seemed too easy despite the element of surprise. So, what, she's just practising on them before she offs the school bully? The trouble with a lot of today's drama is, great acting, great production but people are not exhibiting genuine responses to things. Dramas too often don't portray the full horror and ramifications of a murder, or other deaths. I was a reporter once, we would never, ever have written negative things about a victim. It's just not done.