Season Final. They're the boys and girls in blue who keep our borders safe. You won't believe some of the things they find... or where they find them...

Tonight, a convicted sex offender who plans to talk his way over the border; and a traveler who tries to bring a fully potted plant across the border with him.

A barista arriving from Hong Kong with very suspicious plans is sniffed out by a Customs drug dog. And high-risk plant material at the International mail centre poses a biosecurity risk.

An American traveller who fails to realise that his medicinal cannabis prescription isn't valid outside of the US is stopped at the border.

Turtles are discovered at the Ports of Auckland; and some Aussie promo girls arrive at Queenstown airport with containers full of unidentified white powders.

Stopped at the border, an exotic eastern luxury, which also happens to be a serious biosecurity risk; and a cannabis crusader's plans go up in smoke at Queenstown Airport.

A couple of Russian working girls try to talk their way across the Border; and it's all hands on deck when a slippery visitor arrives at the Port. Catch all the action from the frontline