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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... more

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Artwork for Expanse

Latest Episodes

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.

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.

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.

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.

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ConversationsABC Australia

Recent Guests

Phil Vine
Host of Radio New Zealand podcast The Lodge
Radio New Zealand
Episode: Behind the scenes | S6 host Dominique Bayens in conversation
Jessica Securo
Acting Detective Inspector, WA Police Major Crime Division
Western Australia Police
Episode: BONUS | Inside the Nannup Four police investigation
Jeremy Spivey
Detective Sergeant, Missing Person team, WA Police
Western Australia Police
Episode: BONUS | Inside the Nannup Four police investigation
Cath McDougall
Wife of Chantelle, mother to Leela, family spokesperson
Family of Chantelle McDougall
Episode: 06 Expanse: The Nannup Four | Northcliffe
Jim MacDougall
Chantelle's father
MacDougall family
Episode: 03 Expanse: The Nannup Four | Down the rabbit hole
Kath MacDougall
Chantelle's mother
MacDougall family
Episode: 03 Expanse: The Nannup Four | Down the rabbit hole
Donna Cameron
Former high school friend who provides a first-hand account of Chantelle and the group
Nannup Four case participant
Episode: 02 Expanse: The Nannup Four | Selling snake oil
Kay Savery
Liquor store owner who recalls interactions with Chantelle and the group's dynamics
Nannup local
Episode: 02 Expanse: The Nannup Four | Selling snake oil
Jim McDougall
Chantelle's father, one of the close family interlocutors
Chantelle's family
Episode: 02 Expanse: The Nannup Four | Selling snake oil

Hosts

Dominique Bayens
Host of Expanse, guiding the investigation
Erin Parke
Host of Expanse, Nowhere Man; host and producer

Reviews

4.5 out of 5 stars from 1.1k ratings
  • Stupid. Praying on loss.

    Podcast Addict
    2
    Carrie-O
    a month ago
  • Great!

    Love this! Season 6 in particular is well put together and well reported.

    Apple Podcasts
    5
    Tonklesburg
    Australia2 months ago
  • BIAS AND MISLEADING

    Yeah not a fan and I’ve been listening to True Crime podcasts for over 10 years - this one is extremely skewed and bias in its reporting.

    Apple Podcasts
    1
    White_at_Home
    Australia2 months ago
  • Fantastic host

    This has been put together really well and I love the host. Really thoughtful and caring in the approach to the story.

    Apple Podcasts
    5
    TaraBreuso
    Australia2 months ago
  • Another sad tale of a man ruining a woman’s life

    Another sad Australian tale of a man ruining the lives of the people (in particularly women) around him.

    Apple Podcasts
    5
    HoneyChicken55555
    Australia2 months ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Powerful narrative that ties personal stories to broader cultural context.
Insightful, respectful deep-dive into a difficult case.
Production quality and host leadership are consistently strong.
Some listeners feel the treatment is biased; others praise balanced storytelling.
Balanced journalism that avoids sensationalism while uncovering key details.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Apple Podcasts
#97
United States/History
Apple Podcasts
#123
United Kingdom/History
Apple Podcasts
#242
Canada/History
Apple Podcasts
#52
Australia/Top Podcasts
Apple Podcasts
#7
Australia/History
Apple Podcasts
#185
New Zealand/Top Podcasts

Talking Points

Recent interactions between the hosts and their guests.

Behind the scenes | S6 host Dominique Bayens in conversation
Q: Where did you start in building trust with those involved and getting them to talk to you?
The process began with careful, extended conversations with family members and key figures, acknowledging their vulnerability and gradually gaining consent to include their stories in the podcast, while ensuring ethical boundaries and continuous fact-checking.
Behind the scenes | S6 host Dominique Bayens in conversation
Q: What started you down this pathway? Why did you go after these characters in the first place?
I was curious about the disappearance and the people behind it, wanting to understand who they were and the impact on the town, while also testing the stories that had circulated for years and uncovering new details.
BONUS | Who was Tony Popic?
Q: What stands out most about Tony's personality and his path during the late 1990s and early 2000s?
The guest notes Tony became nomadic, engaged with new-age circles, and formed intense, sometimes controlling relationships that appeared to influence his decisions and state of mind.
BONUS | Who was Tony Popic?
Q: Do you just want to introduce yourself and tell me what your connection is to Tony?
Joe explains he is Tony's brother and describes their shared upbringing, the move to Perth, and Tony's evolving interests and relationships that shaped his later life.
BONUS Expanse: Nowhere Man | Gunslinger
Q: What reaction did people have when they learned the truth about Garrison?
People were shocked and felt betrayed, especially those who had spent time with him and trusted him.

Audience Metrics

Listeners, social reach, demographics and more for this podcast.

Listeners per Episode
Gender Skew
Location
Interests
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Social Media Reach

Frequently Asked Questions About Expanse

What is Expanse about and what kind of topics does it cover?

Season 6 follows a complex, long-running investigation into a group disappearance in a Western Australian town, weaving together family memories, police work, archival reporting, and expert analysis on cult dynamics and coercive influence. Across episodes, listeners are exposed to intimate family perspectives, local community context, and a careful examination of belief, manipulation, and accountability, all while maintaining a respectful, sensitive storytelling approach. The format blends storytelling with investigative rigor, offering deep dives into how rumors, online communities, and personal relationships intertwine to shape a high-stakes mystery.

A standout aspect is the rigorous, character-driven approach that foregrounds those left... more

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These podcasts share a similar audience with Expanse:

1. The Case Of
2. Background Briefing
3. Unravel
4. Secrets We Keep
5. Conversations

How many episodes of Expanse are there?

Expanse launched 4 years ago and published 42 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on Expanse?

Recent guests on Expanse include:

1. Phil Vine
2. Jessica Securo
3. Jeremy Spivey
4. Cath McDougall
5. Jim MacDougall
6. Kath MacDougall
7. Donna Cameron
8. Kay Savery

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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