Pauanui Beach in the Coromandel has been closed due to sharks. Riley is on a mission to find out what type of shark they are and what they are doing there.

A watery portrait of our urban landscape reveals that when it comes to our cities, there is more than meets the eye. From the canopy of ageing skyscrapers to the abandoned pipelines below ground, this visual dissection of Auckland City searches for traces of Waihorotiu, an ancient waterway situated in the city centre. Through archival imagery and animation the film explores the history of Waihorotiu, and the relationship between urbanisation and waterways.

Riley is in Auckland, testing technology that can protect humans from shark attacks. He also talks to a shark attack survivor about her experience and how it's shaped her perception of sharks.

Riley is on a mission out to Great Barrier Island to find the endangered Mako Shark. Makos are the fastest fish in the sea, capable of reaching speeds in excess of 60km/h.

Reveals the extraordinary life-cycle of the longfin eel (tuna), its history among Maori tribes, and the passion of iwi and individuals to help the threatened eel survive and thrive.

Riley Elliott is doing his PhD on the elusive Blue Shark. He's off to New Zealand's Bay of Islands to attach the first of his high tech satellite transmitters for the season.

Riley heads to Stewart Island in New Zealand to learn about the habituation of Great White Sharks, and whether the tourist operations in the area are attracting the sharks to their boats.

Riley is investigating the critically endangered Grey Nurse Shark on the East Coast of Australia. Why are they so endangered and what is being done to save them?

Riley has a fear of stingrays. To find out if stingrays are as dangerous as they are perceived, Riley travels from Auckland to Gisborne and Mokohunau Islands, and interacts with them himself.

Fiji has something extraordinary, a shark marine reserve. How did this come about, what does this mean for Fiji and for the sharks in the reserve?

Hunting, habitat loss and introduced predators have destroyed much of New Zealand's biodiversity, but volunteers around the country are trying to protect what is left. Can they succeed?

Using military rebreathers, the Operatives attempt to sneak into a dock run by the Taiwanese mafia to tag illegal shark finning vessels.

The Operatives track illegal shark finning vessels out to Cocos Island. After 63 hours at sea the Operatives find their last bit of energy to rid the area of illegal fishing vessels.

The team tries to sneak into the heart of illegal fishing in Costa Rica, and Pete ends up going missing at sea.

We visit two sites, one in Manaia, Coromandel and the other in the Abel Tasman, that are trialling ‘Spitfires’, a targeted, innovative method of pest control.

Ngāti Whātua ki Ōrākei are trialling an innovative project to clean up Ōkahu Bay. Decades of increased pollution has diminished the mauri of this site, but mussel reefs may offer a solution.

Maungatautari is home to the largest ecological restoration project in Aotearoa and aims to restore the forest that once grew there. 47 kms of fencing is a tool used to achieve this (FINAL).

Sustainability has become a major issue in recent times as resources become scarce and environmental damage spreads, but is it possible to change the way we live?

As an island nation, New Zealand's marine environment is incredibly important, but what are we doing to it, and how can we ensure its health into the future?

By far Australia's most popular meat, the population now eats ten times more chicken than 50 years ago. Matthew Evans wants to know what the voracious appetite means for millions of meat chickens.

As a boutique free-range pig farmer, Matthew Evans wants to know how the majority of our pigs are farmed in Australia, so he embarks on a surprisingly difficult journey to find out.

Matthew Evans explores the sheer scale of cattle farming in Australia and asks: What is the true cost of producing beef in a country with the size and climate of Australia?

Climate change is already affecting the world we live in but what are its implications for New Zealand and how can we slow it down?

Most of New Zealand's monitored waterways are polluted, but how has this happened? And is it possible to turn things around?

The team travels to a remote island on a mission to find elusive wild tigers rumoured to be living there. Nicola visits an organisation in India working to resolve human-tiger conflict.

Rich and Matt get into a gunfight while tracking illegal gold miners. Jack and Bryce are sent out to train on a crazy flying machine, and crash it into a barbed wire fence.

Hands-on science series. By installing a micro-hydro unit on the Pokaitu stream, Ngāti Kea Ngāti Tuara are now generating their own power. We find out about their future plans for self-sufficiency.

After spotting illegal miners from the sky, the team use a military helicopter to repel them from one of the most intense rainforests on the planet.

Hands-on science series. To stay ahead of the game, The Māori-owned Waikawa Fishing Company is investing in their future through research into innovative, sustainable fishing methods.

New Zealander Pete Bethune and his elite team of former military commandos travel the world bringing poachers and environmental criminals to justice.

Hands-on science series. Since 2001, East Otago has designated a way to allow the tangata whenua to manage the fisheries, after depleting kaimoana stocks raised concerns amongst the community.

Three marae, local and regional councils, other agencies and a private company are all working towards fixing water quality issues along the Whangawehi River.

New Zealander Pete Bethune and his elite team of former military commandos travel the world, bringing poachers and environmental criminals to justice.

The Operatives travel to Sumatra to expose alleged illegal logging operations that destroy protected forests. The team faces the supposed illegal loggers in one of the world's most remote jungles.

A highly-acclaimed BAFTA nominated documentary directed by Gabriela Cowperthwaite that reveals the dangerous truth about the risks of holding orcas captive. Blackfish focuses on Tilikum, an orca held by SeaWorld, who has been associated with the deaths of three people, including experienced Sea World Orlando trainer Dawn Brancheau. Blackfish shows the sometimes devastating consequences of keeping such intelligent and sentient creatures in captivity.

The team continues tracking suspected illegal wildlife traders. They plan a sting operation of a warehouse suspected of buying pangolins, the world's most illegally trafficked animal.

Former Vice President Al Gore explains the facts of global warming, presents arguments that the dangers of global warning have reached the level of crisis, and addresses the efforts of certain interests to discredit the anti-global warming cause. Between lecture segments, Gore discusses his personal commitment to the environment, sharing anecdotes from his experiences.

Erin Brockovich, Robert Glennon and Jay Famiglietti are among those interviewed in Jessica Yu's investigation of the world's looming water shortage. Inspired by the book "The Ripple Effect" by Alex Prud'homme.

The team travels to Indonesia's Leuser National Park to track down suspected illegal poachers who are thought to be contributing to the decline of the critically endangered Sumatran Rhino population.

Professor Donald Chant, a Canadian entomologist, zoologist, and environmental advocate and Chairman, Department of Zoology, University of Toronto talks about the world population growth, the kinds of crises this may present, and the quality of the human environment. Contributors are: Brian Johnson, University of Sussex; Wilhelm Schulte, Food And Agriculture Office, Rome; John Mayone Stycos, Cornell University. Recording ends abruptly.

Walter C (Walt) Patterson is a UK-based Canadian physicist and widely published writer and campaigner on energy. He has worked for Friends of the Earth and published on nuclear energy. He talks about becoming a nuclear physicist, assessing nuclear safety and the effect on society.

People on a unique Pacific Island face the devastating effects of climate change. As an enormous flood threatens to engulf their paradise, who will decide to flee and leave their culture behind forever? And who will stay, hoping only that God will save them from the ever-rising sea? This documentary is an epic, universal portrait of the very real threat rising sea levels present for our planet and the future of humanity.

The team is in Indonesia to uncover illegal logging in the protected Sembilang National Park. In a risky quest to expose those responsible for the devastation, the team ventures deep into the jungle.

There are about 115,500 different algae species, and 200 of them are highly toxic. This documentary reveals the global impact of killer algae and how the problem is growing each year.

A feature-length documentary that shows one of the great rivers of America in crisis while also telling the story of a "sidewalk Indian", Jack Kohler, who discovers his roots among the Klamath River tribes. For Kohler, the conflict is a journey of self-discovery as he uncovers the elemental bond between California native tribes, the river, and its most legendary denizen, the salmon. Kohler comes to the mouth of the Klamath River to make a film about the 1978 Salmon War. But an event occurs that brings the conflict into the 21st century. In May 2001, a federal judge's ruling under the Endangered Species Act (ESA) to cut off irrigation water sparks an angry protest from local farmers. Then in 2002, ignoring the ESA, the Bush Administration orders the unlimited release of water to farmers. Later that year, 80,000 spawning salmon die in the Klamath estuary, which leads to the collapse of the salmon fishery off the California and Oregon coasts. The polarization of Klamath Basin communities gives way to conflict resolution and consensus building. Recognizing that their livelihoods all depend on the health of the river, stakeholders who had been antagonists agree to share the water and to demand the removal of the four dams. The hopeful outcome of the conflict is a lesson in the interdependence of economic recovery with ecological restoration, and the value of finding common ground among competing interests.

In the 1960s Richard O'Barry enjoyed a lucrative career as a specialised animal trainer; he captured the five dolphins that were used in the popular television series 'Flipper'; and taught them the tricks and special commands they used on the show. Four decades later; O'Barry has renounced his former life as a trainer and become an animal rights activist; speaking out against the hunting of aquatic mammals and keeping them in captivity. O'Barry is not welcome in Taiji; a town along the Japanese coast where hunting dolphins is a major part of the local economy; but he and a group of activist filmmakers made their way into the city as well as the carefully guarded harbour in hopes of documenting the abuse of dolphins by fisherman and the poisoning of the waters that has taken a toll on the marine ecology. O'Barry and his colleagues captured some beautiful underwater footage as well as shocking images of how the town's fisherman have sullied the dolphins and their habitat; and director Louie Psihoyos has used this material as the basis for the documentary 'The Cove'; which received its world premiere at the 2009 Sundance Film Festival.

The Ross Sea, Antarctica is the most pristine stretch of ocean on Earth. A vast, frozen landscape that teems with life – whales, seals and penguins carving out a place on the very edge of existence. Californian ecologist David Ainley has been traveling to the Ross Sea to study this unique ecosystem for more than thirty years. He has written scientific papers describing it as a 'living laboratory'. Largely untouched by humans, it is one of the last places where the delicate balance of nature prevails. But an international fishing fleet has recently found its way to the Ross Sea. It is targeting Antarctic toothfish, sold as Chilean sea bass in up-market restaurants around the world. The catch is so lucrative it is known as white gold. Ainley knows that unless fishing is stopped the natural balance of the Ross Sea will be lost forever. He rallies his fellow scientists and meets up with a Colorado nature photographer and New Zealand filmmaker who also share a deep passion for this remote corner of the world. Together they form 'the Last Ocean' and begin a campaign taking on the commercial fishers and governments in a race to protect Earth's last untouched ocean from our insatiable appetite for fish.

The Ross Sea, Antarctica is the most pristine stretch of ocean on Earth. A vast, frozen landscape that teems with life – whales, seals and penguins carving out a place on the very edge of existence. Californian ecologist David Ainley has been traveling to the Ross Sea to study this unique ecosystem for more than thirty years. He has written scientific papers describing it as a 'living laboratory'. Largely untouched by humans, it is one of the last places where the delicate balance of nature prevails. But an international fishing fleet has recently found its way to the Ross Sea. It is targeting Antarctic toothfish, sold as Chilean sea bass in up-market restaurants around the world. The catch is so lucrative it is known as white gold. Ainley knows that unless fishing is stopped the natural balance of the Ross Sea will be lost forever. He rallies his fellow scientists and meets up with a Colorado nature photographer and New Zealand filmmaker who also share a deep passion for this remote corner of the world. Together they form 'the Last Ocean' and begin a campaign taking on the commercial fishers and governments in a race to protect Earth's last untouched ocean from our insatiable appetite for fish.

Te Radar finds that when it comes to land, the more you put in, the more you get out, thanks to a school in Hamilton turning their grounds into the classroom of the future.

An exploration of Mount Cook helps explain how mountains are uplifted and eroded.