It's all AU.

Tosh wasn't particularly paying attention as she made her way to the hotel dining room, setting her laptop on a table to let it run the simulation before going over to the side bar to fix herself a strong, sweet cup of coffee. Turning back, she spotted someone looking at her laptop, and frowned.

"Can I help you?

"He has to be around here somewhere." Tosh leaned against the side of a building, reaching down to pull off one shoe, rubbing her heel. "I'm sure he wouldn't have gone far."

Jack put a hand under her elbow to help her keep her balance, keeping an eye on the street for other people, a small frown on his face. "I haven't seen anyone since we arrived, Miss Sato. Or the TARDIS."

"Well, we haven't searched everywhere yet." Tosh put her shoe back on, giving him a small smile. She tucked her hand into his offered arm, stepping out into the street once more. "We'll find him, or someone, sooner or later."

Jack returned her smile, recognizing the determination she'd shown when he first met her, only a few days before. That somehow, she'd find some solution to the problem of getting home - or finding the Doctor, in this case. He looked over the street as they continued along, spotting a familiar tousled head, even if the outfit wasn't quite what he remembered the Doctor wearing.

"Doctor!"