"No, I mean doctor," she said, firmly. She'd heard that tone before. When they'd been stranded in the 1960s, she'd been forced to work in a little ship to support the Doctor and had been laughed at whenever she'd mentioned her hopes of becoming a doctor. Never mind that she'd only been a few exams from earning her certificate. She wasn't the right sort of person - the right sex or the right colour - to become a doctor, according to them.

Her reply was curt, but not impolite. Yet.

"There are a lot of female doctors in the 21st century," she added, trying to guess when he was from. Not that far into the past, judging by his outfit.