I had heard people saying this was a must watch series , unfortunately the thing is absolute rubbish. Very silly scenario indeed , a train out of control from Scotland to London give it a rest , the train could be stopped anytime. When the train stops first time people stay on after being ordered off by police yeah really. The train then hits a goods wagon and the train stops twice again and they all stay on again even though the guard got a key to open a door to get off. Abby who's in charge at the cyber centre looks like she has just left her school teaching job and has no idea what's happening and what to do , I could go on forever . Having binge watched this to the end hoping something good was going to happen I feel cheated having 6 hours of my life. If you haven't watched this yet don't bother it's silly.