Bluestone 42

Nick’s new number two, Towerblock, has deployed to Afghanistan with a smart new pistol: the Glock 17. Nick feels he must prove that he can handle the weapon too, but being too proud to do the training means the test does not go as planned. Simon tries to gain the respect of others by studying Sun Tzu's Art of War, landing Bird in trouble, and Mac comes up with a novel way to prove he is the filthiest inhabitant of Patrol Base Frost.

An unwelcome blast from the past knocks Nick off his game, and has a dangerous effect on the rest of the team. Simon tries to prove to Nick that he will up his performance in close protection skills by being VERY close to Nick, as often as possible. Mary’s movie night and Bird’s Boogie Night clash, and the pair find themselves locked in a popularity battle. Towerblock, meanwhile, tries to prove that Mac is in denial about his sexuality.

Nick needs some peace and quiet so he can focus on building a forensic profile of the Taliban bomber, but his team are constantly annoying him. He is delighted when he finds a disused roof terrace, but he has a challenger for the spot. Mac is distraught when he finds out his Dad is dating his high school crush, much to Simon’s delight. Meanwhile Towerblock hatches a plan to scare Bird with Rocket's new pet rat.

Nick is stuck looking after a Government Minister who is visiting the base, but offloads the duty onto Mary. He soon regrets it when she unexpectedly takes a shine to him. Nick's attempts to keep the Minister away from Mary just make matters worse, especially as they involve high explosives. Simon, meanwhile, takes it upon himself to become an over-zealous Fire Officer for the base.

Bird is so fed up of Nick going on about Mary that she decides to take action, but the result is not quite what she planned. Simon tries to prove himself at first-person shooter, but his late night practising starts to mess with his head. Meanwhile, the Lt Colonel somehow persuades Towerblock to pimp his ride.

Graham, the new robot, is brazenly stolen from under the noses of Bluestone 42, which proves useful in Nick's hunt for the Taliban bomber. Bird finds herself the reluctant participant in a 'girlie chat' as Mary battles with her feelings for Nick. Meanwhile, Simon loses a key part of his rifle and his lack of trust in Mac and Rocket comes back to bite him.