Under Investigation

This episode of the program is in the Melbourne guide.

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I’ve followed this story from the beginning so I’m looking forward to seeing what they come up with on Monday night.


Season 5

Wednesday 8 February 9:00 PM

The Man In The Hole

Ray and Jennie Kehlet set off for a prospecting trip to the WA outback in March 2015. Their adventure turned into a tragedy, with Ray killed and Jennie still missing. Under Investigation hears new evidence in this baffling mystery.


Join Australia’s leading experts and investigators at the War Table where the country’s most baffling crimes are reopened and re-examined on Under Investigation with Liz Hayes.

Wednesday, February 8, at 9.00pm on Channel 9 and 9Now marks the return of Nine’s flagship studio program when acclaimed investigative journalist Liz Hayes, together with new teams of criminal and forensic experts, puts eight captivating cold cases under the microscope. There’s fresh evidence, exclusive witnesses – and extraordinary revelations.

Under Investigation launches with an eerie outback mystery. 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.

UI will also examine the strange case of “Willi” Koeppen, Australia’s first celebrity TV chef, who disappeared without a trace in 1976. He owned one of Australia’s most celebrated restaurants, patronised by the rich and famous, from prime ministers to pop stars. With a real-life “Cluedo” cast of suspects our UI experts retrace Willi’s final hours and reach a shocking but inescapable conclusion.

The program also investigates a legal scandal without parallel in the Western world: the case of South Australia’s chief forensic officer, Dr Colin Manock, who for more than 30 years conducted thousands of autopsies and gave expert testimony in hundreds of cases without the key specialist qualification. Innocents were jailed, potential murderers went free – and as revealed by UI, senior members of South Australia’s criminal justice system knew the truth.

December 12, 2022 will forever be marked as one of the cruellest days in Australian history, when two young police officers attending a routine missing persons enquiry were ambushed and killed in cold blood on a remote Queensland property. The killers, radicalised online by crazed conspiracy theories, visited their murderous ideology in the real world. In the first major television analysis of this shocking crime, Under Investigation’s team examines what many say is the frightening new front of domestic terrorism.

Liz Hayes said: “I am grateful Under Investigation continues to attract the country’s most skilled criminal experts to dissect and decode both decade-old and recent unsolved crimes. A unique combination of new technology, people’s yearning desire to tell their truth, and our unwavering commitment to comprehensive analysis prove to be groundbreaking for these cases. Absolutely everything is up for investigation.”

Take your seat at the War Table when Under Investigation with Liz Hayes returns Wednesday, February 8, at 9.00pm on Channel 9 and 9Now.

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Wednesday 15 February 9:05 PM

Where’s Willi?

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

Wednesday 22 February 9:00 PM

The Disgraceful Doctor Manock

One of the world’s most unforgivable legal scandals. How South Australia’s Chief Forensic Officer operated for
decades with barely a qualification, giving evidence in 400 criminal cases that saw innocent people imprisoned.

Wednesday 1 March 9:00 PM

Ghost Ship
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?

Wednesday 8 March 9:00 PM

An Excellent Murder
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.

Promo for tonight’s episode (murder of Don Mackay)

Wednesday 15 March 9:00 PM


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. How will Australian police deal with this new and growing threat?

Wednesday 22 March 9:00 PM

The Hit

When one of Australia’s most senior police officers was killed in his own driveway they suspected a professional hit. Investigators jailed and then freed another man. So who killed Colin Winchester? Was it the mafia?

Show moves to 7:30pm in two weeks for the season final.

Wednesday 29 March 7:30 PM

The Third Victim

Richard Dorrough, ex-navy sailor, took his own life in 2014. He left behind a shocking note, claiming to have
murdered three people. But with no names, dates or details, no one knew who the victims were…until now.