Two ageing lovers escaped to Victoria's remote High Country to conduct their secret affair – and have never been seen again.
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.
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.
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.
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.
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.
Australia in the 1980's had arguably the most corrupt police in the world. This corruption went unchecked for years until Sallie-Anne Huckstepp blew the lid.
20 years on from September 11, Under Investigation brings together the Sydney man who survived the falling towers and the Australian Prime Minister who was in Washington.
It's one of the most baffling missing persons cases in recent memory. A young Belgian backpacker vanishes without in Byron Bay. Searching For Theo will rewrite everything we knew.
The brutal murder of 23-year-old Elizabeth "Beth" Barnard in 1986 divided the close but secretive community of Victoria's Phillip Island.
A war table of experts forecast how Australia would participate and ultimately survive if a war comes to fruition between the two superpowers of China and the United States of America.
It's a death unlike any other. In 2010, 24 year-old Phoebe Handsjuk's body was discovered at the bottom of a garbage chute in a luxury Melbourne apartment complex.
"The Queen is dead, long live the King" will be echoed across a nation, at the instant Her Majesty Queen Elizabeth II passes. UI investigates The Crown in a post-Elizabeth world.
UFOs - A topic previously pushed into science fiction is suddenly being taken very seriously based on an extraordinary video, taken, and authenticated by the US Military.
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.
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.
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.
Not since Adolf Hitler has the world feared a dictator like Vladimir Putin. Hitler's madness sparked a World War - could Putin do the same?
Under Investigation follows the trail of the "Coward Killer", John Wayne Glover, from the 1960's to his murder spree of elderly women in the 1980's.
President Trump was the disruptor in chief in the Oval Office, he made his own rules and he left America, the world, and at times, his own staff shaking their heads in disbelief.
Liz Hayes and Under Investigation's formidable experts investigate the strange death of a top SA cop in 1981. Written off as suicide for decades, compelling new revelations point to a sinister plot to kill the decorated detective.
In the 1980's and 90's, Sydney's gay community fell victim to ruthless bashings by savage gangs. Now, Under Investigation can reveal the role played by the NSW Police Force.
After over a dozen killings in 18 months, Sydney's gangland wars are getting bloodier. Under Investigation pulls back the curtain on the city's dark underbelly.
Between 1970 and 2018, 11 people have vanished or been murdered along the Flinders Highway, including missing backpacker Tony Jones. Under Investigation pieces together his final hours.
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.
Uncover the terrifying abuse faced by young, vulnerable women at the hands of the Esther Foundation, a Perth cult once backed by some of the most powerful leaders in the country.
After government inspectors found a slug in a Melbourne catering company's factory, a public health warning erupted into a bitter brawl between a David and a Goliath.
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. What really happened to the Patanela?
He was brave enough to stand up to the mafia in a country town. But Don Mackay paid the ultimate price. His enemies weren't just mafia, he was also facing a political insider.
Four young police officers sent to a rural property are ambushed by violent extremists. They faced the siege at Wieambilla - the point when conspiracy became violence.
One of Australia's most senior officers was killed in his own driveway they suspected a professional hit. Investigators jailed and then freed another. Who killed Colin Winchester?
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.
Liz Hayes and her team of investigators assemble formerly top-secret diplomatic documents to expose what really happened to the Balibo Five, a team of Australian journalists executed in East Timor. Their deaths mark the beginning of a shameful government cover-up that continues tonight.
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.
When a 12-year-old Queensland girl was brutally killed, her sister's boyfriend Graham Stafford was almost immediately convicted with her murder. Liz Hayes and her team of experts examine the flawed investigation and a shocking miscarriage of justice.
Sandrine Jourdan was a vivacious mother of three living in the small town of Caboolture until she mysteriously vanished in 2012. Liz Hayes and her team of experts raise serious doubts about the official narrative.
The disappearance of Ballarat woman Samantha Murphy has horrified Australia. Liz Hayes and her team of experts take Under Investigation to the frontline of this baffling mystery.
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.
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.
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.
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.
