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.