[The Doctor had been frowning somewhat and rubbing the back of his neck awkwardly at the mention of what Tieria was doing to his furniture - was he really that bad? Really? Well, after what he had been told... But when he heard about crawling through the ventilation ducts, a grin spread across the Doctor's face. It was as if he couldn't imagine a finer prospect than crawling through vents to sneak into Tieria's office.]

Ohhh, good old fashioned sneaking, I like it! [He beamed, rubbing his hands together.] Who's going first?