Under Investigation

1. High Country Mystery

Air Date: 2021-03-01

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

2. The Disappearance of Janine Vaughan

Air Date: 2021-03-08

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.

3. China & The Virus

Air Date: 2021-03-15

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.

4. Jaidyn Leskie – Little Boy Lost

Air Date: 2021-03-22

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.

5. Putin's Poison

Air Date: 2021-03-29

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.

6. The Disaster Aircraft

Air Date: 2021-04-05

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.

1. Episode 1

Air Date: 2021-08-24

2. Episode 2

Air Date: 2021-08-31

3. Episode 3

Air Date: 2021-09-06

4. Murder Island

Air Date: 2021-09-13

5. War with China

Air Date: 2021-09-14

6. Girl in the Chute

Air Date: 2021-09-20

1. Operation London Bridge

Air Date: 2022-02-09

"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.

2. The Unidentified

Air Date: 2022-02-16

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.

3. Curse of the High Country

Air Date: 2022-02-23

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.

4. Mapping Mr Cruel

Air Date: 2022-03-02

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.

5. Nuclear Reaction

Air Date: 2022-03-09

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.

6. Putin the Tyrant

Air Date: 2022-03-16

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?

7. Episode 7

Air Date: 2022-03-23

8. Episode 8

Air Date: 2022-03-30

1. The Cop Who Knew Too Much

Air Date: 2022-09-26

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.

2. The Hate Police

Air Date: 2022-10-03

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.

3. Gangs of Sydney

Air Date: 2022-10-10

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.

4. The Highway

Air Date: 2022-10-17

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.

5. Dark Seas

Air Date: 2022-10-24

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.

6. Girls Gone

Air Date: 2022-10-31

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.

7. Bad Faith

Air Date: 2022-11-07

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.

8. Slug Gate

Air Date: 2022-11-14

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.

1. The Man In The Hole

Air Date: 2023-02-08

Loving couple Ray and Jennie Kehlet join colleague Graham “Grumpy” Milne on a gold-prospecting trip to the red heart of Western Australia. Three people go out but only one comes back. Then a body is found in a remote mineshaft. With a senior member of the police investigative team joining our panel of UI experts, the case is laid open as never before.

2. Where's Willi?

Air Date: 2023-02-15

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.

3. The Disgraceful Doctor Manock

Air Date: 2023-02-22

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.

4. Ghost Ship

Air Date: 2023-03-01

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?

5. An Excellent Murder

Air Date: 2023-03-08

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 living by the creed: You speak, you die. He was also facing a political insider.

6. Ambush

Air Date: 2023-03-15

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.

7. The Hit

Air Date: 2023-03-22

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?

8. The Confession

Air Date: 2023-03-29

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.

9. The Last Lunch

Air Date: 2023-08-25

10. Secrets of Balibo

Air Date: 2023-10-17

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.

1. The Snake and the Shotgun

Air Date: 2024-02-07

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.

2. The Trials of Graham Stafford

Air Date: 2024-02-14

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.

3. The Vanishing of Sandrine Jourdan

Air Date: 2024-02-21

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.

4. The Runner

Air Date: 2024-02-28

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.

5. I am the Law

Air Date: 2024-03-06

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.

6. Spy Nation

Air Date: 2024-03-13

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.

7. The Good Snitch

Air Date: 2024-03-20

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.

8. Shots Fired

Air Date: 2024-03-27

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.

9. For The Love of Eden

Air Date: 2024-06-18

The body of 15-year-old Eden Westbrook is found hanging from a tree in a public park. Liz Hayes and the panel discover serious flaws in the police investigation.

10. Death Of A Model

Air Date: 2024-06-25