Season 3 of The Twelve is returning, and Sam Neill will reprise his role as the powerful lawyer, Brett Colby SC.
The new eight-episode season, called “The Twelve: Cape Rock Killer,” features Colby taking on a difficult case with personal stakes. He’s asked to represent the husband of an old friend, who stands accused of a disturbing murder.
The current trial is also bringing a decades-old mystery back to light – the unsolved 1968 murder of two teenagers is now being re-examined.
The show continues to track the 12 jurors involved in the case, exploring how their personal backgrounds, hidden experiences, and preconceived notions influence their interpretation of the evidence presented.
Season 3 of The Twelve introduces a mostly new group of actors, including Danielle Cormack, known for her role in Wentworth, alongside Eryn Jean Norvill, Sarah Peirse, and William Zappa, while also featuring a returning cast member, Neill.
Here’s everything you need to know about The Twelve: Cape Rock Killer.
The Twelve season 3: Cape Rock Killer release date
You can watch all episodes of The Twelve: Cape Rock Killer on ITVX starting Sunday, May 31st, 2026.
The first two episodes are also set to air on ITV1 on Sunday 31 May 2026 from 10:45pm.
I was so excited when the new season finally dropped! It first became available in Australia on BINGE and Foxtel’s Showcase on Monday, August 4th, 2025, and they released a new episode every week, which was perfect for keeping me hooked.
The Twelve season 3: Cape Rock Killer cast
Sam Neill is back as Brett Colby, the lawyer who connects all the seasons of The Twelve.
Danielle Cormack returns as Gabe Nicholls in Season 3, and the cast expands with the addition of Eryn Jean Norvill, Sarah Peirse, and William Zappa.
The confirmed cast for The Twelve season 3: Cape Rock Killer includes:
- Sam Neill as Brett Colby SC
- Danielle Cormack as Gabe Nicholls
- Eryn Jean Norvill as Amanda Taylor
- Sarah Peirse as Beth Chaplin
- William Zappa as Alan Chaplin
- Ewen Leslie as Andrew Retsis
- Phoenix Raei as Bassam Aziz
- Nathalie Morris as Jazmyn Tanner
- Bessie Holland as Camilla Jones
- Paul Tassone as Blake Gibson
The cast also includes Hanah Tayeb, Catherine Moore, Bolude Watson, Stuart Daulman, Charles Napoleon An, Libby Stone, and Claire Leach.
Sam Neill expressed his excitement about returning to his role as Colby when the cast list was revealed. He said he was thrilled to be working with such a talented group of actors.
Sarah Walker has done it again! Her latest story is a real page-turner, packed with secrets, unexpected twists, and some uncomfortable realities. You won’t be able to put it down, I guarantee it.
As someone who’s really enjoyed the show in the past, I was thrilled to join Sam Neill – a fellow New Zealander! – and the incredible cast for this new season. It’s been a genuine pleasure to be a part of it.
I’ve really enjoyed being part of this local drama – it’s a captivating show with a lot of mystery and memorable characters. The director and crew did an amazing job this season, and I especially loved the scenes where I got to act opposite Sam in the courtroom.
What is The Twelve season 3: Cape Rock Killer about?
In “The Twelve: Cape Rock Killer,” Brett Colby faces a difficult case when a murder trial involves the husband of someone he’s known his entire life, making things deeply personal.
The person accused of murder is on trial, and the proceedings are revealing a complex and unsettling puzzle far beyond a simple crime.
The current trial brings a decades-old mystery back into focus – the 1968 murder of two teenagers. As the twelve jurors deliberate, they also find their own perspectives and lives profoundly affected by the case.
In “The Twelve: Cape Rock Killer,” Brett Colby (Sam Neill) finds himself in a challenging position when he defends the husband of an old friend, who is accused of a terrible crime. This case is particularly difficult for Brett because it hits close to home.
The current trial is uncovering a hidden mystery, leading to the reopening of a decades-old cold case – the 1968 murder of two teenagers. As the jurors deliberate, they each find their own lives profoundly affected by what they learn.
The season was filmed in Western Australia, including Perth and the Margaret River region.
Is there a trailer for The Twelve season 3: Cape Rock Killer?
Yes, a trailer has been released for The Twelve season 3: Cape Rock Killer.
The dramatic new clip features Brett Colby back in court handling a difficult case, and hints at a long-standing mystery that will be a central focus this season.
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The Twelve season 3: Cape Rock Killer – what is the drama based on?
The Twelve is based on the Belgian series De Twaalf, created by Bert Van Dael and Sanne Nuyens.
The Belgian series centers around twelve jurors tasked with deciding a murder case. It examines how their personal backgrounds and individual perspectives shape their judgment of the evidence.
The Australian adaptation started with a comparable idea, but it’s now structured as an anthology series. Each season features a different case and jury, though Sam Neill’s character, Brett Colby SC, appears in every season as a consistent element.
I’m really excited about Season 3, especially ‘Cape Rock Killer’! It’s keeping the anthology style going – each season is a totally new story. This time, it centers around a current murder trial, but the real mystery goes way back to the 1960s, which is a really cool twist.
The Twelve: Cape Rock Killer will be available to stream on ITVX from Sunday 31 May 2026.
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Authors
Morgan Jeffery leads the editorial content for TopMob across all its digital platforms as the Digital Editor. Before joining TopMob, he worked as TV Editor at Digital Spy and has appeared as a television commentator on BBC Breakfast, BBC Radio 5 Live, and Sky Atlantic.
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