Nick regrets showing off to his new number 2, Towerblock. Simon and Bird come to blows over a special book belonging to the Lt Colonel.

A blast from the past knocks Nick off his game. 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. Rocket gets himself a pet rat, much to Bird's disgust.

The team gets a visit from a government minister, to whom Mary unexpectedly takes a shine. 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. The lieutenant 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. Bird finds herself the reluctant participant in a girlie chat with Mary.