Kill a Stoat and Save New Zealand?

Updated at 4:20 pm on 30 September 2014

Originally aired on Talking Heads, Sunday 5 August 2012

Kim Hill and a panel of experts consider Sir Paul Callaghan's final challenge - to make New Zealand pest free. How realistic is this vision? Will New Zealanders rise to the challenge? What will it cost? And would it be worth the expense?

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