It's all AU.

She looked quizzically at him. “What the hell?”

“Short version? Pocket universe hun, lots of different versions of people, mostly stunning by the way, psychically malleable atmosphere. Just what the Doctor ordered.” He started bouncing on his heels, suddenly excited, “Lots to explore, you'll love it.” He saw a figure approaching, and made to wave them over, not sure how much time, if any had passed since he'd been here last.

Rose went to get some lunch at a cafe, stopped at peered at the young looking man in a beige cricket outfit, and celery on his lapel sit out front. Walked up to him asking, "Excuse me, but would you be the Doctor?"

Had to be. The celery.

Romana sat at a table in the lobby of the hotel, with various electronic components around here.

She was putting together a sonic screwdriver, although it wouldn't be quite recognizable yet, to someone who didn't know very well how one functioned.

She was bored, and wanted something to do with her hands.

The Doctor stepped out his TARDIS, locked it behind him, and smiled over his shoulder at the person walking past.

"Hello," he called out.