The Bluestone 42 team are called out on routine ops with their CIA liaison officer Carter, where things take a drastic turn. Back at base, they are introduced to Mary, the new padre, who Nick, the Ammunition Technical Officer, takes an instant shine to. Meanwhile, Simon grapples with Millsy over the report that Nick has forced him to write on his behalf, and the young Privates - Mac and Rocket - enjoy winding up Bird who may or may not have named the bomb seeking robot 'Arthur'.

Nick tries to find some decent food; Simon gets into trouble.

Midnight raid on a bomb factory; Simon tries to get a book deal for his memoir.

Mary reveals a secret about her past; Bird is offered a promotion.

Nick tries to prove he is not superstitious; Simon tries to earn respect by joining in dangerous homemade games with Mac and Rocket.