Mit : Joe Cole, Alexandra Roach, Kim Chapman,

Joe, an off-duty police officer travelling on the Glasgow sleeper to London, discovers that someone is attempting to gain control and drive the train remotely. He calls Abby, acting technical director of the National Cyber Security Centre, for help. With the entire UK rail network soon under attack, the pair realise, if they fail to get the passengers off in time, their lives may be at risk.