Peering carefully at the house, the Doctor walked up the block until she saw two figures emerge: a human female and a human male. They appeared to be dressed in somewhat formal attire. Raising a curious eyebrow, the unspoken question propelled her forward; she ducked under a tree, standing up against its brown trunk to mask her equally brown skin so she could watch them.

The woman appeared to stop for a moment, and pull something out of her purse. The man stopped and turned to her. The Doctor wasn't close enough to hear what they were saying, but they looked like they were going to leave the house soon. If they were going by car, she wouldn't be able to follow them on foot -- she could run fast, yes, but not that fast.

Slowly, she emerged from underneath the tree and walked a little closer to the house to peer at the car and its license plate number. Also, she wanted to hear more of their conversation, to get some idea of where they might be going. But sweeping her gaze around her surroundings, she judged that she couldn't get close enough for that to successfully happen. Not to mention, a faint nagging in the back of her mind told her she might look out of place in this neighbourhood. So...her other idea, sonicing and entering, was out of the question.

She grasped her chin and rubbed it in thought. Then, an idea came to her. Surely one of them had to be carrying a cellphone. If she could isolate its signal and track it via GPS, the TARDIS would lead her right to their destination.

Her eyes bolting wide open at the idea, she spun around, pivoting on her left heel, and strode quickly back to the TARDIS.