Until Australia's submarine fleet can go nuclear the navy must keep its near-retirement vessels deployable. It's been a struggle.
A hacker — who claims to have been part of one of the world's most successful gangs — tells us why Australia is a target and laughs at the distress caused by the Medibank data breach.
As the Coalition feuded over vaping, Four Corners can reveal a lobby group gave $44,000 to the Liberal Party but declared it as personal gifts from its director on electoral returns.
Electric cars, solar panels and wind turbines — green technology relies on what can be a dirty industry. Why acting on climate change may require a massive increase in mining.
Plans for a controversial apartment development in the beachside town of Hawks Nest, secretly backed by the family of corrupt NSW politician Eddie Obeid, are set to be challenged in court by traditional owners.
Untouched beaches and native wildlife are why Hawks Nest residents love their home. All of that could change if the Obeid family get their way.
Beyond the dances and skits there's a darker side to TikTok. The app's algorithm is exposing users to dangerous content while controlling which people and political movements get attention.
Tim Stewart's family watched with alarm as he descended into bizarre political conspiracy theories. They tell Four Corners of their concerns about his extreme beliefs and his relationship with the Prime Minister.
Four Corners last year exposed Parliament's toxic workplace culture and questioned the conduct of some of the most senior politicians in the nation. At the time, there was one allegation that couldn't be revealed. This is it.
Russia 'sees itself at war' with the West. Four Corners investigates the international network of patriots determined to remind Australia that Vladimir Putin's Russia is a force to be reckoned with.
A Four Corners investigation reveals allegations that elite Australian military men are being caught up in the dark world of private wars.
A leader at one of Australia's most-promising COVID-19 vaccine project says basic research is "horribly underfunded".
Australian woman Stephanie Browitt survived the White Island volcano disaster. Her father and sister didn't. She says if help had come sooner, fewer people would have died.
Royal Caribbean cruise line promised to get passengers 'close to the drama' when they visited the White Island volcano. Now they are set to sue the cruise company for compensation over the deadly disaster.
There are concerns a two-year-old Australian citizen trapped in Xinjiang province in China is caught up in what experts call a growing use of "hostage diplomacy" by Beijing.
The Australian branches of Jeanswest, Dangerfield, Ikea and H&M also source cotton from China's Xinjiang province, which is described by the UN as resembling a "mass internment camp".
Like a flash mob, they appear and then dissolve back into the city once their task is complete. They carry cable ties, gas masks and spare clothes, and they need to be able to outrun the police. These are Hong Kong's frontliners.
Two Australian universities have announced reviews over links to technology that is being used to carry out mass human rights abuses by the Chinese Government.
In a panicked phone call from China's far-western region of Xinjiang, this qualified nurse reveals how she has been arrested and forced to work in a factory.
As a child he showed sociopathic tendencies. By the time he was an adult he was a drug dealer with an extensive criminal record who would go on to kill six people.
Four Corners spent weeks in the city and its outer suburbs with members of the Sudanese community, victims of crime, police and the judiciary, to hear their side of the African crime story.
One of the most senior judges in Victoria labels the reporting and political rhetoric around African crime in Melbourne as "dangerous" and "skewed".
The two Australians who helped 12 boys and the soccer coach escape safely from a flooded cave in Thailand were given diplomatic immunity in case anything went wrong during the rescue.
Vladimir Putin is playing a game of chess with the West and he's always thinking a few moves ahead, according to senior intelligence officials.
His alleged meetings with Russian officials have put the Trump campaign under a microscope, but former foreign policy adviser Carter Page tells Four Corners he is the victim of a witch hunt.