1/8 A locomotive disaster sets Reid and Long Susan on a collision course.
8/8 As the drama draws to a thrilling close, what will Ash need to sacrifice to conquer Roach?
7/8 The Unit are closing in on Roach, but a new player in town is one step ahead of them.
5/8 Saint-Marie's commerce minister is discovered dead.
6/8 A notorious armed robber arrives in town, and Ash's past catches up with him.
4/8 The team are faced with the seemingly impossible murder of an air stewardess.
5/8 The death of a young girl alerts the Unit to a batch of lethal pills.