Nightsleeper

The overnight train from Glasgow to London is hacked. Passengers are trapped on board, including police officer Joe. As the train hurtles towards disaster, Joe manages to make contact with Abby, the cybersecurity director.

As Abby attempts to bring the train to a halt, the remaining passengers turn on Joe.

Realising that someone on board may be working with the hackers, Joe turns his attention to his fellow passengers, while Abby stuns her colleagues by taking the train off the mainline.

While Hud's shocking attempt to stop the train his way threatens to end in disaster, Abby is stunned to discover that Joe may be in even more danger than any of them realised.

As Hud and Miller interrogate Abby, Joe tries to deal with the fallout from the shock shooting whilst deciding whether to put his faith in Saj or the other passengers.

As dawn breaks and Abby realises the truth, Joe and the others reach the end of the line.