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Toddler Jaidyn Leskie was murdered in 1997 in a case that transfixed Australia. Greg Domaszewicz, who was acquitted of the killing, speaks out for the first time in more than 20 years – and our expert panel re-examines the evidence.

Janine Vaughan was 31 when she was murdered after accepting a lift on a night out in 2001. Our panel uncovers shocking police tapes and unseen CCTV of Janine's last known moments.

Two ageing lovers escaped to Victoria's remote High Country to conduct their secret affair – and have never been seen again.

Supposedly safe in witness protection, Andrew Petrelis, the star witness in a $40 million dollar drug importation is found dead. His death is deemed a tragic drug overdose.

China's authoritarian government is quietly developing AI designed to control its citizens. Liz Hayes and her team investigate just how far China's silent invasion will go.

While searching for a snake in her garage, a devoted mother is fatally shot in the back by her husband. Liz and her team of experts examine the events surrounding that night.

UI re-investigates the baffling case of Melbourne's "Mr Cruel" that involved a series of child abductions and murder during the late-1980's.

Following the ground-breaking investigation that examined the disappearance of elderly lovers Russell Hill and Carol Clay, from their remote campsite in Victoria's High Country.

"The Queen is dead, long live the King" will be the words echoed the instant Her Majesty Queen Elizabeth II passes. UI investigates The Crown in a post-Elizabeth world.

Former WA cop Adrian Moore exploited his authority and the trust vested in police to manipulate, rape, and abuse thirteen women over a decade before being convicted in 2022.

The shooting of Kumanjayi Walker by former NT police officer Zachary Rolfe in 2019 sparked one of the most contentious and racially-charged criminal sagas in Australian history.

The world was told the Coronavirus leaped from animals to humans at a market in China – but many scientists now fear it leaked from a lab. Experts reveal the new research techniques that put us all at risk.

Nearly 400 people lost their lives to a design flaw in Boeing's 737 Max that caused two crashes, but the aircraft is back in the skies and Australians could soon be stepping aboard.

Travellers onboard cruise ships have seen violent crime, pollution, and now a COVID crisis. Liz Hayes and a panel of experts examine whether it has learnt from past lessons.

Nearly 50 years ago, 11-year-old Joanne Ratcliffe and 4-year-old Kirste Gordon were snatched from the Adelaide Oval. Groundbreaking new technology helps identify their kidnapper and reveal a shocking twist.

Australia's first celebrity chef, star of radio and television Willi Koeppen, runs one of the country's most successful restaurants before he vanishes without a trace in 1976.

One of the world's most unforgivable legal scandals. How South Australia's Chief Forensic Officer operated for decades with barely a qualification, providing false evidence.

Australia's most baffling maritime mystery, the 1988 disappearance of the Patanela just 10 miles off the coast of Sydney. No distress call. No debris. All four on board lost without a trace. What really happened to the Patanela?

Richard Dorrough, ex-navy sailor, took his own life in 2014. He left behind a shocking note claiming to have murdered three people, but no details to identify the victims.

It is every family’s nightmare. A mother goes out on her regular morning jog, and never returns. In a special edition of Under Investigation on Wednesday night, Liz Hayes and a team of experts travel to the Victorian regional city of Ballarat to delve into the mysterious disappearance of 51-year-old Samantha Murphy.

Russian President Vladimir Putin has unleashed chemical warfare on his opponents, poisoning them with deadly toxins. Our panel reveals evidence that marks him as a terrorist who puts whole communities at risk in his quest for power.

UI investigates Australia's delicate dance with nuclear energy, which many experts say is our only way of surviving past fossil-fuels into a carbon-free future.