Season 6 Expanse: The Nannup Four with Dominique Bayens In 2007 four people disappeared from a blue farmhouse on the outskirts of the Western Australian town of Nannup, leaving behind the scatterings of a life, a note pinned to the door and a question: was the disappearance a choice… or murder? As police and family try to piece the puzzle together to find the Nannup Four, what emerges is a bizarre story of secrets, hidden identities and rumours of a dark online cult. In season six of ABC's award-winning Expanse podcast, host Dominique Bayens investigates the unsettling circumstances around the disappearance, speaking to the people left behind - who still question what they could have done differently. Because when something like this happens, and you're left staring back, how do you live with the choices you've made? Expanse is an internationally award-winning podcast that explores big stories from across Australia — a vast continent where anything can happen. In Series 5: Nowhere Man, Erin Parke followed the story of a young American who dumped his bicycle and walked out into the Great Sandy Desert in remote northern Australia. He was an Alaskan firefighter, seemingly with everything to live for. So why did he risk it all to go into the wilderness alone? And how do you search for someone who doesn't want to be found? In Series 4: Uncropped, host Danielle O'Neal goes from a mosquito-laden lagoon in far north Queensland to the Australian government's classified UFO files, to the US Congress as she seeks to understand what happened, its legacy and why believable people say seemingly unbelievable things. Spies in the Outback (Series 3) won the Excellence in Radio Broadcasting award at the Northern Territory Media Awards in 2024 for the story of Pine Gap, a secret US/Australian defence base hidden in the outback. From the Dead (Series 2) won silver in the Documentary: History category at the New York Radio Festival awards. It delves into a wild tale of survival at sea off Tasmania's rugged southwest coast. Pink Diamond Heist (Series 1) was shortlisted in the New York Radio Awards, Documentary: History category. This season takes you on a rollicking ride through Western Australia on the trail of a diamond heist.
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Behind the scenes | S6 host Dominique Bayens in conversation
Apr 27, 2026
What goes into making a season of Expanse? What considerations are made when telling the stories of people's lives? Host of Expanse: The Nannup Four, Dominique Bayens, sits down with fellow podcast…
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BONUS | Inside the Nannup Four police investigation
Apr 20, 2026
It has been months in the making, but police are opening up the files on the missing Nannup Four for Expanse host Dominique Bayens, and there's news on another search.
BONUS | Who was Tony Popic?
Apr 13, 2026
Since the podcast started rolling out, a lot of people have got in touch with information. Two people have been able to shed light on some previously unknown parts of the story.
06 Expanse: The Nannup Four | Northcliffe
Apr 06, 2026
A family friend and former policeman continues to search for answers for Jim and Cath McDougall decades after the Nannup four vanished. The family and friends of Chantelle McDougall try to find their…
05 Expanse: The Nannup Four | Simon says
Mar 30, 2026
Jim and Cath McDougall are left reeling as the true depth of Simon Kadwill’s deception is revealed. Dominique tracks down people from his past, and hears from someone who has never spoken before who…
04 Expanse: The Nannup Four | A question of belief
Mar 23, 2026
Tony Popic is talking about an end of days, Simon is seeing spirits and Chantelle is forced into a difficult decision as increasingly troubling hints something's not right come to light.
03 Expanse: The Nannup Four | Down the rabbit hole
Mar 16, 2026
Dominique travels across the country to meet the two people who might be able to help her understand how Chantelle came to be living a reclusive life in a hidden corner of Western Australia…
02 Expanse: The Nannup Four | Selling snake oil
Mar 09, 2026
A chance encounter in the streets of Melbourne in 1998 leaves a friend wondering what Chantelle McDougall has been pulled into. Dominique hears about the escalating pattern of control Simon Kadwill…
01 Expanse: The Nannup Four | The people in the blue house
Mar 02, 2026
When three adults and a child disappear without a trace from the isolated bush community of Nannup in 2007, it sparks disturbing theories about what might have happened. What was going on in the…
INTRODUCING — Expanse: The Nannup Four
Feb 23, 2026
When four people disappeared from a blue farmhouse on the outskirts of the Western Australian town of Nannup in 2007, they left behind the scatterings of a life, a note pinned to their door and a…
BONUS Expanse: Nowhere Man | Gunslinger
Aug 19, 2025
The search for Robert Bogucki brought together a cast of colourful characters, including a cigar-toting, moustachioed American named Garrison ‘Gunslinger’ St Clair.
06 Expanse: Nowhere Man | Lost and found
Aug 05, 2025
A quarter of a century after he survived the Great Sandy Desert, Robert Bogucki is back for an odd-couple road trip with the Aboriginal tracker who helped search for him all those years ago.
05 Expanse: Nowhere Man | Miracle in the desert
Jul 29, 2025
After almost six weeks in the desert, Robert Bogucki is found alive in what quickly becomes known as ‘The miracle in the desert’. But now he has to survive the tabloid television treatment and a…
04 Expanse: Nowhere Man | Alaska
Jul 22, 2025
After years obsessing over the case, Erin Parke has made contact with the elusive and enigmatic Robert Bogucki.
03 Expanse: Nowhere Man | The green berets
Jul 15, 2025
Robert Bogucki has been given up for dead, but the drama’s only just beginning.
02 Expanse: Nowhere Man | Trackers
Jul 08, 2025
The clock is ticking to bring Robert Bogucki out of the desert alive, and police turn to Aboriginal trackers to try to find their man.
01 Expanse: Nowhere Man | Ghost in the desert
Jul 01, 2025
When a bicycle is found abandoned on a remote track in the Great Sandy Desert it triggers an urgent search. Who is this mystery man and why has he walked into one of Australia’s deadliest landscapes?
INTRODUCING — Expanse: Nowhere Man
Jun 23, 2025
It’s 1999, and a young American man is missing in the Australian outback. Police soon realise there’s something very strange about this case – the man appears to have plunged into the desert on…
05 Uncropped | The legacy
Nov 25, 2024
A bombshell is dropped in US Congress that makes a lot of people start thinking about UFOs, now called UAP, differently. Danielle O’Neal tries to understand the implications of everything she’s heard…
04 Uncropped | UAP in the USA
Nov 25, 2024
Despite an alarming coincidence being uncovered in the government’s UFO files, a young intelligence officer recommends the files are closed and investigations shut down. Decades on, while the U.S. is…
03 Uncropped | The UFO files
Nov 25, 2024
The Tully phenomena spreads, with unexplained circles starting to crop up around the country. Reports of them all are filed away by the RAAF in the secret UFO files. But, one young UFO researcher is…
02 Uncropped | Who is visiting?
Nov 18, 2024
Hoards of people descend on the Pennisi property to take a look at this ‘saucer nest’, sending the family running for cover. Turns out, in the years to come that would be the least of their worries…
01 Uncropped | The sighting
Nov 18, 2024
On a hot morning under blue skies, a young banana farmer saw something he couldn’t explain that sent his pulse racing. It looked like a flying saucer and it left behind a mysterious mark. The chain…
INTRODUCING – Expanse S4: Uncropped
Nov 11, 2024
In 1966 a Queensland farmer thought he saw a UFO that left behind a real physical mark in some reeds. That sighting set off a chain of events that would haunt him for decades and leave a lot of…
05: Spies in the Outback | The secrets of Pine Gap
May 14, 2024
Host Alex Barwick hears just how far Pine Gap’s reach is today, uncovers the secrets of stolen land and explores what it means for Australia to have a spy base hidden in the heart of the country…
04 Spies in the Outback | The spy who loved Alice
May 07, 2024
The Cold War has finally ended but Pine Gap, or ‘The Base’ as it’s become known, is expanding and it’s getting involved in conflicts across the world. Host Alex Barwick finally goes inside Pine Gap…
03 Spies in the Outback | The women get wild
Apr 30, 2024
Nuclear fear prompts thousands to flood to Alice Springs in the 1980s to try and close Pine Gap and reveal its secrets. This time the woman are in charge and they don't want Australia involved in…
02 Spies in the Outback | Politics, pressure and protest
Apr 23, 2024
As the Cold War enters the 70s, it becomes clear that Pine Gap is really a spy base with eyes on the Soviets – and it's putting Alice Springs in the nuclear crosshairs.
01 Spies in the Outback | Selling a space base
Apr 16, 2024
In the grip of a crippling drought in the 1960s, Alice Springs sees an economic lifeline when America promises to build a 'space base' on the edge of town. But once Pine Gap's bizarre, oversized golf…
INTRODUCING – Expanse S3: Spies in the Outback
Apr 11, 2024
When America promised to build a space base in outback Australia in the middle of the 1960s space race, few suspected it would put Australia in the nuclear cross-hairs in decades to come. That space…
