"I once had a friend who went by that name."
When the new teacher introduces himself as John Smith, Sarah felt her heart skip a beat. True, it was common name, as he had said, but he was teaching physics, a subject very close to the Doctor's heart. As she walked away a few moments later, images flashed through her mind: Daleks, giant spiders, Sutekh and his mummies, robots… Was this what she'd been waiting for? Was this her Doctor returning at last? She looked around at Mr John Smith and shook her head, clearing her thoughts. Nah… couldn't be.