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Expanse

Expanse

ABC Australia 42 Episodes Nov 2, 2026

Expanse is an award-winning podcast from ABC Australia that investigates big stories from across the continent. Season 6, 'The Nannup Four,' explores the mysterious disappearance of four people from a farmhouse in Western Australia in 2007. Host Dominique Bayens delves into the bizarre circumstances, including hidden identities and rumors of a dark online cult. The series examines the impact on those left behind and the lingering questions about what really happened.

Episodes

01 Expanse: Disappearing in the Devil's Triangle | The crash
01 Expanse: Disappearing in the Devil's Triangle | The crash Nov 2, 2026 0:30:54 It’s a pitch black and freezing August night in 1981 when a pilot overhears the terrifying final minutes of flight VH-MDX over radio.  
INTRODUCING | Expanse: Disappearing in the Devil's Triangle
INTRODUCING | Expanse: Disappearing in the Devil's Triangle Oct 26, 2026 0:03:58 The Barrington Tops is rugged and unforgiving. With impenetrable bush and towering mountains, it eats up people and planes. It’s sometimes called the ‘Devil’s Triangle’. And it guards a mystery that hasn’t been answered in 45 years.  
UPDATE | Expanse: The Nannup Four - A new search
UPDATE | Expanse: The Nannup Four - A new search Oct 6, 2026 0:25:07 It's been a busy few months for host Dominique Bayens, working alongside search organisers and chasing down loose ends. It all comes together with some crucial new information coming to light as a community-led search for the missing Nannup four kicks off. 
UPDATE | Expanse: The Nannup Four - Hope on the horizon
UPDATE | Expanse: The Nannup Four - Hope on the horizon Jun 19, 2026 Host of season 6, Expanse: The Nannup Four, Dominique Bayens has been following the developments of the case of four people who disappeared from the isolated town of Nannup. 
Behind the scenes | S6 host Dominique Bayens in conversation
Behind the scenes | S6 host Dominique Bayens in conversation Apr 28, 2026 0:20:22 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 host Phil Vine to take you behind the curtain.
BONUS | Inside the Nannup Four police investigation
BONUS | Inside the Nannup Four police investigation Apr 21, 2026 0:26:24 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?
BONUS | Who was Tony Popic? Apr 14, 2026 0:24:12 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
06 Expanse: The Nannup Four | Northcliffe Apr 7, 2026 0:35:26 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 own answers, as one last glimmer of hope emerges. 
05 Expanse: The Nannup Four | Simon says
05 Expanse: The Nannup Four | Simon says Mar 31, 2026 0:36:04 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 provides a startling insight into how Simon might have ended up on the path he did.   
04 Expanse: The Nannup Four | A question of belief
04 Expanse: The Nannup Four | A question of belief Mar 24, 2026 0:34:18 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
03 Expanse: The Nannup Four | Down the rabbit hole Mar 17, 2026 0:33:17 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, alongside a self-styled spiritual guru 18 years her senior.   
02 Expanse: The Nannup Four | Selling snake oil
02 Expanse: The Nannup Four | Selling snake oil Mar 10, 2026 0:30:08 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 exercises over Chantelle.If you can add to this story, or have information you think might be important, please get in touch by emailing expanse.abc@proton.me.In this episode, we cover

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