Q&A feeds your brain this week with a great assortment of guests. Rhodes Scholar with an Oxford Blue in boxing and one of the better performers in the House, Shadow Minister for Families and Indigenous Affairs, Tony Abbott makes a welcome return to the program.

Q&A wrapped its debut season with a cracking line up to take your questions. Audiences tuned in to see Australia's longest serving Treasurer and soon-to-be civilian, Peter Costello, Minister for Health and Ageing Nicola Roxon, former leader of the Australian Democrats, then a Labor MP and now an academic, Cheryl Kernot, author and journalist, David Marr and former editor of the Op-Ed page of The Australian and a former Liberal adviser, Tom Switzer give us a closing show to remember.