Expanse

About Expanse

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.

Publisher

ABC Australia

Category

history · society & culture

Language

en

Explicit

No

First episode

18 Jul 2022

Latest episode

5 Oct 2026

Latest episodes

17 of 45 episodes have a transcript.

1. 

   5 Oct 2026TRANSCRIPT

   UPDATE | Expanse: The Nannup Four - A new search

   Host Dominique Bayens shares crucial new information driving a community-led search for the missing Nannup four.

2. 

   18 Jun 2026TRANSCRIPT

   UPDATE | Expanse: The Nannup Four - Hope on the horizon

   Host Dominique Bayens updates listeners on the Nannup Four case, revealing hopeful developments in the ongoing investigation.

3. 

   27 Apr 2026

   Behind the scenes | S6 host Dominique Bayens in conversation

   Host Dominique Bayens interviews Phil Vine about the creative process and storytelling considerations behind making a season of "Expanse."

Inside a recent episode

UPDATE | Expanse: The Nannup Four - A new search

Published 5 Oct 2026 · Transcript excerpt

[…] After all that, it's another dead end. And Matt has to make the difficult decision to call the search off. Everyone has given their all. But it's over. We've pretty much exhausted everything we can do out there. That evening, I drive away from Northcliffe, waving goodbye to these people who've put their lives on hold to try and get answers for Jim and Kath, for Tony Poppich's family. It's pretty emotional. saying goodbye to everyone and yeah it's been such an emotional afternoon i feel at peace that this area has been thoroughly searched as much as we possibly could still the thought of jim and kath packing up their caravan and driving away from southwest wa again no closer to their little girl is pretty heartbreaking But I also can't ignore the love and support that's stumped up for them. […]

Who has been a guest on Expanse

Names identified in recent episode analyses. Showing up to five guests.

• Phil Vine
• Tony Popic
• Simon
• Chantelle

Reach and audience

Public platform figures. Ratings count people who left a rating, not total listeners.

Apple Podcasts (US)

4.5 / 5

97 ratings

Spotify

4.8 / 5

298 ratings

Podcast Authority Score: 5 / 100

A composite of feed quality, social presence, YouTube performance and engagement. Read the methodology.

Quality

0

Social presence

0

YouTube

0

Engagement

27

Questions about Expanse