More than 100,000 Chinese students have studied in New Zealand in the past 20 years. What impact do those graduates have on the China-New Zealand relationship and is New Zealand making the most of their goodwill? John Gerritsen travelled to China to speak to former students.

After the attacks on the mosques in Christchurch there were pleas for unity and love in the face of evil and a huge outpouring of grief and support for the Muslim community. But did New Zealanders just pat themselves on the back for reacting well, while doing nothing to tackle on-going Islamophobia? Philippa Tolley investigates.

Tuvalu is the poster boy for small island countries suffering from climate change and its very existence and that of its people is under threat. Despite the gloomy outlook, Tuvalu has big plans for its future and its leaders are urging polluting nations to help.  Sally Round travelled to Tuvalu to investigate

New Zealand's mental health system is on the brink of a major overhaul, Health Correspondent Karen Brown examines the pressure points and asks what's needed to help those living with mental illness.

Are too many Māori babies being taken into care? Māori news correspondent, Leigh Marama McLachlan  investigates whether Oranga Tamariki is getting the balance right between keeping children safe and keeping families together.

Under the 1955 Adoption Act,  thousands of Māori babies were adopted into Pākehā families. Te Aniwa Hurihanganui investigates the impact on Māori who grew up desperate to re-connect.

Volunteering is facing a crisis. Teresa Cowie investigates how essential services can survive as more and more people decide they can't make on going commitments to help out.

In this award winning documentary, Insight's reporter Teresa Cowie heads inside prison to find out more about the impact of New Zealand's meth epidemic.

The Christchurch mosque attacks have prompted claims the security agencies have wielded their powers in skewed and unfair ways. Have resources been wasted surveilling Muslims and virtually ignoring possible alt-right extremists? In this second part of a two-part investigation, Phil Pennington asks if the agencies have been monitoring the right people.

Insight - The Christchurch terror attack happened apparently without any indication of danger being flagged. So who is supposed to be keeping New Zealand safe? In this first part of a two part investigation, Phil Pennington asks how comprehensive New Zealand's security system is and why it now appears to be playing catch-up.