An exhausted Private Tracey Walters of the Royal Logistics Corps is driving an army truck full of Royal Cambria Fusiliers back from a three-day exercise. There is a commotion in the back and suddenly a car is upon them from the other direction. Sam swerves but the truck goes into the car and crushes it. SIB and the German Police arrive at the scene and it seems clear Sam fell asleep or lost concentration. Worse still, Jo finds explosive flash burns on the tarmac behind the crash site.

• Chris O'Dowd
• Douglas Hodge
• Pip Torrens