09:05 NZRU says concussion protocols are strong and working

Dr Ian Murphy is the New Zealand Rugby Union's Medical Director.

09:20 Christchurch retirement homes

Rest home residents in Christchurch have been left out of pocket by their retirement villages taking up red-zone offers and the government has refused their request to compensate them. The 2011 quakes destroyed almost 200 homes in three retirement villages.

John Collins is Executive Director Retirement Villages Association; and Grey Power New Zealand Federation's Roy Reid.

09:40 Memorial garden in Dunedin's Anzac Ave to honour the actions of conscientious objectors

Plans to build a memorial garden in Dunedin's Anzac Ave to honour the actions of conscientious objectors have caused ripples with the local RSA.

Archibald Baxter, a Dunedin man, and 13 other objectors were sent to the frontline in France, tied to posts in the open, and forced into bombarded trenches.

The Archibald Baxter Memorial Trust has asked the Dunedin City Council for permission to build a memorial on Anzac Avenue to remember these and other conscientious objectors.

The local RSA says it is not opposed to the memorial but Anzac Avenue is not an appropriate place for it.

Dr Jacky Bowring is Professor of Landscape Architecture at Lincoln University, who's been involved in the design of a range of memorials. She's also the author of a book called A Field Guide to Melancholy.

Dr Bowring has also been involved in discussions about the Canterbury Earthquake Memorial, which will honour all those affected, and form part of the greater Christchurch recovery.

09:50 US correspondent Luiza Savage

10:05 Professor Terry Collins on Green chemistry

New Zealand-born scientist Professor Terry Collins was the first person in the world to teach green chemistry. He says we have to stop using technologies without any apparent concern for their environmental impact. He is the director of the Institute for Green Science (IGS) at Carnegie Mellon University in Pittsburgh, Pennsylvania, and currently a guest at the Dunedin Science Festival where he will be discussing his work.

10:30 Book review: The Woman in the Picture by Katharine McMahon

Reviewed by Elisabeth Easther, published by Orion.

10:45 The Reading: The ACB with Honora Lee by Kate De Goldi

Based on her own family's experiences of dementia, Kate de Goldi has created a warm quirky tale about the particular special alliance between the young and the very old. (2 of 5, RNZ)

11:05 Business commentator Rod Oram

Rod Oram discusses how two more companies - Scales, the apple grower and packer; and Metro Performance Glass - have been priced for their impending share market floats.

11:20 Historian reinvestigates 1872 hanging of Kereopa te Rau

Historian and author Peter Wells reinvestigates the history, facts, and social, political and racial tensions underpinning the 1872 hanging of Kereopa Te Rau for the murder for Carl Volkner. Wells has used the writings of William Colenso and Mother Suzanne Aubert as sources in his new book about the case, Journey to a Hanging. He explains what the Crown's 2014 apology for the execution of Te Rau means for the case, and where uncertainties still lie.

11:45 Media commentator Gavin Ellis

Gavin Ellis has a bouquet for Shelley Robinson of The Press and her five-week investigation of the homeless in Christchurch.

Music played in this show

Artist: Avalanche City
Song: Ends in the Ocean
Composer: Baxter
Album: Our New Life Above the Ground
Label: Warner
Time: 10:05