The Doctor jumps a little when a young lady suddenly bursts into the room. He'd just been pottering about, exploring. Well, beginning to explore. He hadn't actually made it out of the room yet. It's a cozy little kitchen, and he'd been looking through the cupboards to try and figure out the year.

This is immediately abandoned the moment the girl joins him, of course. "It's alright, I'm here," he reassures after barely a moment of looking at her fright, and he runs over to the door to see what's chasing her.

...There's nothing, actually. Just a regular, well-lit staircase, no sign of disturbance, no sound of footsteps or growls or yells or anything. He closes the door anyway, before turning back to the girl to make sure she's alright.

"Okay, I've got you, you're safe now," he says calmly, reaching gently out for her shoulders to steady her.