"I am The Dentist." he said, chuckling. "Don't worry, it'll be out of the road before you know it!" he said as he unlocked the ISSTU and slipped inside, careful not to let her see inside. He flipped a few switches and the ISSTU disappeared out of the road and behind the sidewalk. He opened the door and walked back out. "Now will you put that phone away?" 

(( is alright, I'll just RP that the ISSTU was set specially by the Dentist to be a police box, as he had always looked up to the Doctor ))