As the team prepare to leave Afghanistan for good, Simon receives some devastating news.

Ellen has to learn to bend the rules, Mac and Rocket do gladiatorial combat and Bird sets Simon up for a fall.

The team suffer a Taliban attack on base, which distracts Ellen and Bird from their bickering and Towerblock from a difficult phone call to his wife.

A new arrival on base attracts Simon's attention. Towerblock is put through his paces after challenging Rocket to a battle of the fittest.

The team are called out to a major operation, where events take a worrying turn. Simon makes a life-changing discovery.

We rejoin the Bluestone 42 team after the IED explosion has hit their mastiff. Have they all survived, and will they be ambushed?