Panellists: Tanya Plibersek, Minister for Health; Greg Hunt, Shadow Minister for Climate Action; Professor Lawrence Krauss, Theoretical Physicist & Cosmologist; Dr John Dickson, Director of the Centre for Public Christianity; and Dr Cindy Pan, Medical Commentator & Author.

Panellists: Lawrence Krauss, Theoretical Physicist & Cosmologist; Gene Robinson, America's First Openly Gay Bishop; Fred Nile, Conservative Morals Campaigner; Amanda Vanstone, Former Howard Government Minister; and Susan Ryan, Age Discrimination Commissioner.

Host Tony Jones is joined by Liberal Senator Cory Bernardi, Shadow Health Minister Catherine King; Former Lord Mayor of Sydney Lucy Turnbull; Spectator Australia's Rowan Dean; Theoretical Physicist Lawrence Krauss.