Inside a dangerous terror network in Australia — the man who infiltrated it speaks out.

One year after the Wakeley church stabbing shocked Australia, a former secret agent who infiltrated the country's jihadist underworld unmasks himself.

In an extraordinary Four Corners exclusive, the former ASIO agent reveals to investigative reporter Sean Rubinsztein-Dunlop how a resurgent Islamic State (IS) network is radicalising Australian teens and plotting violence.

He exposes the network's links to a global web of terrorist leaders.

The agent spent years inside extremist circles, helping authorities thwart attacks and stop IS terrorists.

Now, with teenage terrorism and hate crimes on the rise in Australia and around the world, he's stepping out of the shadows to sound the alarm.

BBC Journalist Richard Bilton travels the globe meeting brilliant scientists racing to turn the tide on climate change – people whose ideas could reshape the world.

From volcano labs in Iceland, to disappearing glaciers in Switzerland and to sun-reflecting clouds in Australia, he finds bold experiments aimed not just at cutting emissions but removing carbon from the atmosphere.  

The film, Can Climate Scientists Save the World? zeroes in on Australia's Great Barrier Reef, where researchers are working to protect coral with technology as delicate as it is daring.  

This is a story of urgent action, hope, and a global effort to future-proof our earth.  

This week Four Corners unpacks the rise of Xi Jinping, China's most dominant leader since Mao Zedong, and the global consequences of his rule. 

With rare access and deep reporting, Frontline correspondent Martin Smith investigates Xi's path to power, his ideological vision, and how he has reshaped China's relationship with the world. 

Once dismissed as a compromise leader, Xi Jinping seized total control through a ruthless anti-corruption campaign, silencing dissent and tightening the Party's grip.

His "China Dream" envisions a dominant China—militarily, technologically, and on the world stage. 

But Xi's grip is being tested.  

Economic instability, mass protests, and international pushback challenge his vision for a resurgent China.  

As tensions over Taiwan escalate and China's future grows uncertain, The Power of Xi reveals the stakes of his rule—for China, the U.S., and the world. 

A decade-long investigation has uncovered explosive new evidence suggesting that corrupt former NSW Crime Commission assistant director Mark Standen's criminality was far more extensive than the public was led to believe.  

While Standen was jailed for a single drug importation, he is the most senior crime fighter in the country ever to be convicted for such an offence. 

And now sources and official documents indicate he protected criminals, sabotaged investigations, and is believed to have helped facilitate multiple imports of illegal drugs. 

Investigative reporter Janine Cohen has been following Standen's case for 14 years, uncovering new details that challenge the official narrative. 

Now, in his first ever on-camera interview, Standen insists he is innocent — but law enforcement colleagues and others who knew him tell a different story.  

As calls grow for a deeper inquiry, Four Corners exposes the full extent of a betrayal that shook Australia's justice system. 

The Yoorrook Justice Commission is making history as Australia's first formal truth-telling inquiry, shedding light on a violent past long buried in the nation's consciousness. 

Bridget Brennan, with the ABC's Indigenous Affairs Team in collaboration with Four Corners, has been documenting the powerful testimonies presented to the groundbreaking commission in Victoria, which expose the deep and ongoing impact of massacres and human rights abuses which began when Australia was colonised. 

Among these stories is the harrowing account of the Warrigal Creek massacre, where, in 1843, dozens of Aboriginal people were shot dead by white settlers in retaliation for the killing of a pastoralist's nephew. 

For Elizabeth Balderstone, the tragic history of Warrigal Creek is not just a historical account - it is a lived reality. She and Gunaikurnai elder Uncle Russell Mullett have come forward to share their story, bringing long-suppressed truths onto the public record.  

"If we are to have a future where we live together with understanding," Uncle Russell said, "we must first be willing to know our history—and accept it." 

The documentary witnesses the gruelling and deeply personal work of the Aboriginal truth commissioners, as they attempt to document the true history of Victoria. 

The team also follows along as the Commission investigates the catastrophic legacy of a former Prime Minister. 

Truth/Yoorrook is a fearless, definitive documentary which examines how we as a nation reckon with our colonial past and take critical steps towards truth, healing and justice.

This week on Four Corners, a one-hour special reveals the deep failures and systemic issues plaguing Australia's childcare sector.  

With nearly one-and-a-half million children enrolled in childcare across the country, parents trust that their children will be safe and cared for.  

And while the glossy brochures and marketing paint a rosy picture, the reality of the system is far darker, and families are paying the price. 

Reporter Adele Ferguson uncovers shocking cases of child abuse, neglect, and injury, highlighting critical gaps in childcare safety and accountability.  

As the $20 billion industry grows, the focus on financial gain over child welfare has sparked a nationwide call for action.

Advocates warn that without immediate reform, the childcare industry will continue to put profit over children's safety. 

For more than 80 years, the Australian War Memorial has stood as a solemn shrine to those who have served and sacrificed for our country.  

This week, Four Corners reveals how this sacred institution is increasingly entwined with the global arms industry — raising troubling questions about conflicts of interest, corporate influence, and the future of the memorial itself. 

In Sacrifice, Gold Walkley Award-winning journalist Mark Willacy exposes how the war memorial has accepted funding from some of the world's largest weapons manufacturers, despite former insiders condemning the money as "dirty" and inappropriate for an institution dedicated to honouring the human cost of war.

As the war memorial undergoes a $550 million redevelopment — described by critics as an attempt to turn the site into a "Disneyland of war" — this investigation asks whether the expansion ensures the memorial's future or undermines its fundamental purpose.  

Four Corners investigative journalist Dan Oakes uncovers the secrets of Australia's black-market tobacco trade in Tobacco Wars.

With illicit cigarettes readily available in cash-only stores and distributed by unmarked vans across the country, this investigation reveals a vast network stretching from Melbourne's suburban tobacconists to international smuggling routes.

Using concealed cameras and exclusive access to law enforcement, the Four Corners team follows the illicit pipeline, exposing the lucrative industry that is fueling violent organised crime while robbing the government of billions in lost revenue.

Tobacco Wars investigates the high-stakes underworld where arson attacks, extortion, and deadly feuds are used to control the illegal cigarette market.

As the government grapples with policy responses and law enforcement agencies struggle to disrupt smuggling syndicates, Tobacco Wars raises urgent questions about the country's ability to curb this thriving illicit trade.

With gripping undercover footage and exclusive insights from key players, Four Corners delivers a must-watch exposé on how Australia's efforts to cut smoking rates have inadvertently fueled a dangerous and violent underworld.

The Comeback King explores Donald Trump's dramatic resurgence following his 2020 election defeat, examining the pivotal moments and strategies that propelled him back to the forefront as a dominant force in U.S. politics.

Families call on governments to act as loved ones fall into extremism. Reporter Avani Dias investigates the growing threat of homegrown extremism, the painful reality of radicalisation and desperate calls for stronger action.