She'd never taking up smoking. It made her a rarity among medical students and doctors, actually, who despite knowing exactly - exactly, in minute detail - what cigarettes did to your insides...smoked in droves. There was a simple reason for it; several times a day you had to get out of the hospital before everything about hospitals choked you, and smoking was one of the best excuses around.

Jo had, when she'd been in Seattle, taken to doing plies on the hospital roof, on the other side of the helipad. Sometimes the 'plies' had taken the form of leaning against the railing and taking huge, gulping breaths of air.

She'd tried to help when Cadogan had quit smoking. He'd gotten a quarter every time they were in a bar and he reached for a cigarette but put the pack back - and she'd gotten one every time he'd actually lit up. It's that that has her reaching her hand out, palm up.

"Pay up."