Episodes 42
Avg. Duration 30m
Activity Declining
Apple Rating 4.5 (88)
Since Jul 2022
Latest Episode Apr 2026

Publishing Details

Schedule
Weekly
Format
Serial
Consistency
100%
Hosting
www.abc.net.au

Contact & Outreach

About This Podcast

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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Recent Episodes

S6E9 Behind the scenes | S6 host Dominique Bayens in conversation

Apr 27, 2026 20m

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…

S6E8 BONUS | Inside the Nannup Four police investigation

Apr 20, 2026 26m

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.

S6E7 BONUS | Who was Tony Popic?

Apr 13, 2026 24m

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.

S6E6 06 Expanse: The Nannup Four | Northcliffe

Apr 06, 2026 35m

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…

S6E5 05 Expanse: The Nannup Four | Simon says

Mar 30, 2026 36m

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…

S6E4 04 Expanse: The Nannup Four | A question of belief

Mar 23, 2026 34m

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.

S6E3 03 Expanse: The Nannup Four | Down the rabbit hole

Mar 16, 2026 33m

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,…

S6E2 02 Expanse: The Nannup Four | Selling snake oil

Mar 09, 2026 30m

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…

S6E1 01 Expanse: The Nannup Four | The people in the blue house

Mar 02, 2026 30m

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…

S6 INTRODUCING — Expanse: The Nannup Four

Feb 23, 2026 3m Trailer

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…

S5E7 BONUS Expanse: Nowhere Man | Gunslinger

Aug 19, 2025 23m

The search for Robert Bogucki brought together a cast of colourful characters, including a cigar-toting, moustachioed American named Garrison ‘Gunslinger’ St Clair.

S5E6 06 Expanse: Nowhere Man | Lost and found

Aug 05, 2025 33m

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.

S5E5 05 Expanse: Nowhere Man | Miracle in the desert

Jul 29, 2025 30m

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…

S5E4 04 Expanse: Nowhere Man | Alaska

Jul 22, 2025 33m

After years obsessing over the case, Erin Parke has made contact with the elusive and enigmatic Robert Bogucki.

S5E3 03 Expanse: Nowhere Man | The green berets

Jul 15, 2025 31m

Robert Bogucki has been given up for dead, but the drama’s only just beginning.

S5E2 02 Expanse: Nowhere Man | Trackers

Jul 08, 2025 29m

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.

S5E1 01 Expanse: Nowhere Man | Ghost in the desert

Jul 01, 2025 29m

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?

S5 INTRODUCING — Expanse: Nowhere Man

Jun 24, 2025 3m Trailer

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…

S4E5 05 Uncropped | The legacy

Nov 25, 2024 38m

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…

S4E4 04 Uncropped | UAP in the USA

Nov 25, 2024 31m

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…

Frequently Asked Questions

How many episodes does Expanse have?

Expanse has published 42 episodes since July 2022, covering topics in Documentary, History.

Is Expanse still active?

Expanse is currently declining with new episodes weekly. Average episode length is 30m.

How do I contact Expanse for sponsorship or guest appearances?

Sign up on Grep.FM to access contact details for Expanse, including email and social media links.

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