Kate and Thirteen
The Doctor was eager to see Las Vegas. She hadn't been to Nevada in centuries, and that was a bit of a doozy for a trip. Going to actually have a holiday was something she'd always wanted to try. Maybe even try to strike it rich in a casino! Or ride in a limo. She loved limos.
Stepping onto the strip, she winced up at the sun and started to look around with a big grin, immediately spotting a familiar face and waving. "Kate! Hullo! Funny seeing you here, eh?" She approached the young woman who looked almost as excited as the Doctor was.