Nightsleeper

When a passenger realises that someone is attempting to hack his train, he makes a desperate call for help. But can two total strangers work together to get everyone off in time?

When the cyber attack on the rail network prevents Abby from seeing the obstacles in the sleeper's path, she realises that she's in race against time to avert disaster; with the so-called Driver being one step ahead, she must think fast.

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.

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

Abby's convinced she knows how to stop the remaining carriages, but with Joe out of contact and almost out of time, is it too late for those hurtling towards the end of the line?