"He's..." For a girl who can talk about venomous snakes for hours without pause without a problem, she has surprising difficultly defining Fitz. "He's my very best friend in all the world."

It's not quite right.

But it's not wrong either.

"Most people, when they come down to our lab, think there's only one scientist down there - a FitzSimmons. Imagine their surprise when they find the pair of us."

There's a pause, and she wrinkles her nose.

"Actually, there's more than a few who can't seem to get it into their heads that there are two of us. They don't tend to last long."