The step back confuses her. It's the Doctor. She knows it's the Doctor. She wouldn't mistake him; not like this; not face to face.

"I'm here, Doctor. I've spent the last several months with UNIT trying to figure out a way to track you. They've got the time travel bit down...for the most part. I've been all over time trying to get lucky."

She bites her bottom lip, watching him carefully. "Looks like today is my lucky day."