Nick regrets showing off to his new number 2, Towerblock. Simon and Bird come to blows.

A blast from the past knocks Nick off his game. Bird tries to teach Mary a lesson.

Nick and the Lt Colonel find themselves in a battle of wills. Rocket gets a pet rat.

The team gets a visit from a government minister, to whom Mary unexpectedly takes a shine.

Bird hatches a plan to stop Nick and Mary going on about each other once and for all.

Simon's lack of trust in Mac and Rocket comes back to bite him.