Environmental apocalypse now or never? Green's Senator Christine Milne was up against Herald Sun columnist and climate change sceptic Andrew Bolt, with Minister for Small Business Craig Emerson, former Communications Minister Helen Coonan, and author, essayist and playwright Linda Jaivin holding the casting votes.

With the Independent Senator, Nick Xenophon, the National's Senator Barnaby Joyce and Labor Senator, Mark Arbib, on Q&A this week, we only have one thing to say…welcome the Senate. Joining them were journalist and author of "Inside Kevin 07", Christine Jackman, and Chief Executive of the Australian Industry Group, Heather Ridout.