An off-duty SAS soldier, Tom Buckingham, must thwart a terror attack on a train running through the Channel Tunnel. As the action escalates on the train, events transpire in the corridors of power that may make the difference as to whether Buckingham and the civilian passengers make it out of the tunnel alive.
Sam Heughan
Ruby Rose
Andy Serkis
Tom Wilkinson
Tom Hopper
Hannah John-Kamen
Noel Clarke
Owain Yeoman
Jing Lusi
Ray Panthaki
Anne Reid
Richard McCabe
Douglas Reith
Sarah Winter
Ben Shephard
Jayne Secker