University of Melbourne graduate Dr Kat Franklin has practised medicine in some of the world's most challenging and dangerous environments, including Afghanistan, South Sudan and Iraq. She tells us why and how she does it - and how, of all the places she's been, Oxford University, with its Harry Potter-style buildings, was one of the strangest. Reporter and producer: Val McFarlaneAudio engineer: Chris HatzisTheme music: Rory ClarkSpecial thanks to Lauren Hartnett