A blast from the past knocks Nick off his game, while Bird tries to teach Mary a lesson that the padre is out of touch with the troops.

Nick and the Lt. Colonel find themselves in an unexpected battle of wills, whilst Rocket gets himself a pet rat, much to Bird's disgust.

The team gets a visit from a Government Minister, who Mary unexpectedly takes a shine to. Nick tries to get rid of him with a questionable plan involving high explosives.

Bird hatches a plan to stop Nick and Mary going on about each other once and for all, and the Lt. Colonel persuades Towerblock to pimp his ride.

Nick's hunt for the Taliban bomber hots up, Simon's lack of trust in Mac and Rocket comes back to bite him, and Bird finds herself the reluctant participant in a `girlie chat' with Mary.

We rejoin the Bluestone 42 team after the IED explosion has hit their mastiff.

The team are called out to a major operation, and Simon makes a life-changing discovery.

Towerblock is put through his paces after challenging Rocket to a battle of the fittest.

The team suffer a Taliban attack on base, which distracts Ellen and Bird from their bickering.

Ellen has to learn to bend the rules and Mac and Rocket do gladiatorial combat.

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