Raised by addicts, Dr Katriona O'Sullivan defied the odds to become a university lecturer.
Her parents were addicted to heroin, she was neglected and not fed. But for the care she received from two influential teachers and the occasional stroke of luck, life may have gone in a very different direction.
Katriona's written a book about her life called Poor.
Presenter: Mobeen Azhar
Producer: Edgar Maddicott
