09:05 Dangerous chemical in synthetic drugs deaths - revealed

There have been 20 deaths linked to synthetic drugs in the last few months alone – and we now know the powerful ingredient that appears to be killing users. The majority of testing done by the Environmental Science and Research Crown Institute (ESR) has found the dangerous chemical AMB-FUBINACA to be present -- the same chemical that was linked to a mass casualty event in Brooklyn in 2015 that left a number drug users in a "zombie-like" state. Kathryn Ryan talks to ESR's Chief Forensic Chemistry Manager Kevin Walsh.

09:25 Testing proves 'lake snot' invasive, traced to USA

6 hectare patch of slime/lake snow in Stevensons Arm,  Lake Wanaka, June 2016

6 hectare patch of slime/lake snow in Stevensons Arm, Lake Wanaka, June 2016 Photo: Davy Pattison Adventure Wanaka

It's been proved for the first time that the snot-like mucus found in some of the country's most pristine lakes is an invasive species. To date the slime has been found in Lake Wanaka, Lake Hawea, Lake Wakatipu, Lake Coleridge and Lake Dunstan, with fears it  has also spread to Lake Waikaremoana and Lake Benmore in the North Island. The genetic source of Lindavia intermedia (the algae responsible for creating the slime) has been linked back to specimens found in Lake Youngs, near Seattle. Kathryn Ryan talks to University of Otago freshwater scientist Dr Marc Schallenberg and Otago Regional Councillor Andrew Noone who says there now needs to be a national focus to address the problem.

09:30 Get on with it!

Why put-off until tomorrow what we can do today? Ever found yourself making yet another cup of tea when you should be working or studying?  Rebecca Olsen,  PhD student from Victoria University's School of Psychology is researching the art of putting things off and what we can do to have more self control.

09:45 Asia correspondent Anna Fifield

The latest on the Burma situation, which the UN calls "ethnic cleansing", and will the new UNSC North Korea sanctions actually work?

10:05 Marie Monmont - Wildness!

Marie Monmont is a French chef and chocolatier who founded Wildness in Wellington. The organic vegan chocolate is made with the Brazilian fruit cupuacu, which she discovered when she and her family moved to Brazil to live several years ago. Wildness employs prisoners at Rimutaka and Arohata prisons to package the product as part of a pre-release programme. Marie is also working on another project where inmates will manufacture and package granola bars, using cupuacu.

10:35 Book review

The Break by Marian Keyes, reviewed by Sonja De Friez, published by Penguin Random House NZ

10:45 The Reading

Part eight of The Changeover by Margaret Mahy, read by Miranda Harcourt.

The feature film adaptation of The Changeover opens in cinemas around the country on 28th September 2017.

It is directed by Miranda Harcourt and Stuart McKenzie and stars Timothy Spall, Melanie Lynskey, Lucy Lawless, Nick Galitzine, Dame Kate Harcourt — and introduces young NZ actor Erana James (Ngati Whatua Orakei, Waikato Tainui) as Laura Chant.

Listen to more about the movie and the book by clicking on these links:

Miranda Harcourt and Bridget Mahy talk about The Changeover

Hannah August reviews the original book

11:05 New music with Jeremy Taylor

Jeremy Taylor returns to active duty with new music from Australian great Paul Kelly and US songbird Lana Del Rey, together with an unreleased solo acoustic record from the 70s by Neil Young.

11:30 Sports commentator Brendan Telfer

New Zealand golfer Lydia Ko

New Zealand golfer Lydia Ko Photo: Photosport NZ

A critical couple of weeks coming up for Lydia Ko as she battles her way her toughest year so far in her professional career, the Silver Ferns continue to build a very impressive record in 2017 with their series win over on England on Wednesday night, and an unusual admission from Steve Hanson on the eve of the All Black'stest against the Springboks.

11:45 The week that was with Te Radar and Gemma Gracewood

Comedians Te Radar and Gemma Gracewood guide us towards the weekend with a few laughs including the British couple who became a laughing stock after trying to crowdfund for their dream Italian wedding.