"Why are we on the roof of a building in London?" Donna asked.

"Don't you recognize it?"

She looked around at the view, then smiled in recognition. "Yes. We sat, just over there, waiting for the TARDIS to recover from the car chase."

The Doctor nodded. He fidgeted, hands in pockets. "That's where we were lawfully biodamped."

"For better or for worse." She laughed, remembering. "You waved your sonic screwdriver at me, said I wasn't special."

"I've never been more wrong," he said, pulling a small box from his pocket and getting down on one knee. "Will you?"

"Yes, please."