Betrayal: Dirty Secrets Season 4 True Story, Episodes and Karoline Borega

Betrayal: Dirty Secrets brings the Hulu true-crime franchise back for Season 4 with one tightly focused family story. The three-part docuseries centers on Karoline Borega, who was married to Colorado Springs police officer Joel Kern, and on the personal consequences that followed when a hidden life and years of misconduct came to light. All three episodes begin streaming on August 4, 2026, on Hulu in the United States, with access through Hulu on Disney+ for eligible bundle subscribers.

The official description places Karoline and her daughter Nicole at the center rather than treating the story only as a catalogue of wrongdoing. That distinction matters. The series is about discovery, the emotional shock of reinterpreting a marriage and childhood, and the difficult work of rebuilding after trust has collapsed. Viewers who follow survivor-led documentary storytelling may also want our guides to American Nightmare and The Perfect Wife documentary, which similarly examine how a public narrative can differ sharply from life inside a relationship.

This guide explains the confirmed release information, the participants named by ABC News Studios, what the season is expected to cover and what viewers should keep in mind when reading about a real family. It avoids adding claims that have not been confirmed by the official release or the documentary itself.

What is Betrayal: Dirty Secrets about?

According to ABC News Studios, Karoline Borega was married to Joel Kern, a respected Colorado Springs police officer. The series follows the moment that image began to unravel and the family learned about conduct that had been concealed from them. The official synopsis describes a web of lies that deceived both the family and the institution Kern represented.

The production frames the story through the effects on Karoline and Nicole. Karoline discusses the betrayal of a spouse and the process of rebuilding her life. Nicole addresses how her father’s infidelities caused her to question memories of her childhood and their relationship. That intergenerational perspective gives the season a broader emotional scope than a simple account of an affair.

True-crime coverage can become exploitative when it turns private pain into a puzzle for viewers to solve. Dirty Secrets appears designed around testimony and documentation, including exclusive footage from a Colorado Springs Police Department internal-affairs investigation. The responsible approach is to distinguish between what interviewees describe, what official records show and what the series interprets.

Who is Karoline Borega?

Karoline Borega is the principal storyteller in Season 4. The official press material identifies her as Kern’s former wife and as the person whose discovery drives the docuseries. Her role is not limited to explaining what happened. The season also follows how she protected her family, reassessed the life she thought she knew and created a future after the disclosures.

That survivor-centered structure is consistent with the larger Betrayal franchise, which adapts stories first explored through the iHeartPodcasts series of the same name. Podcast host Andrea Gunning appears in the documentary, helping connect the long-form audio reporting with the visual series. Viewers looking for another story about the consequences of professional authority being misused can read our Bad Surgeon Netflix review, though the cases and legal histories are entirely separate.

Who appears in Betrayal: Dirty Secrets?

The confirmed interview list includes Karoline, her daughter Nicole, one of Kern’s former lovers and Andrea Gunning. ABC News Studios says the former partner offers insight into her relationship with Kern, while internal-affairs video provides an institutional record alongside the family interviews.

No traditional “cast” should be assumed for this documentary. The people on screen are participants discussing their own experiences, journalists or podcast figures helping organize the account, and individuals appearing in archival or investigative material. Their presence does not make every statement an independently established fact, so context in each episode remains important.

How many episodes are in Season 4?

Betrayal: Dirty Secrets is a three-part docuseries. Hulu lists the Season 4 premiere for August 4, and Disney’s August schedule describes a three-episode premiere. Because the season itself contains three parts, viewers should expect the complete Dirty Secrets story to be available at launch rather than on a weekly rollout.

Official episode titles and individual synopses were not published in the sources available at the time of writing. The safest expectation is that the narrative will move from the original confession and discovery, through the family and police investigation, to the aftermath and Karoline’s rebuilding process. That is an editorial inference from the confirmed series description, not a published episode order.

What makes Season 4 different from earlier Betrayal stories?

The franchise has previously released The Perfect Husband, A Father’s Secret and Under His Eye, alongside the 2026 primetime series Betrayal: Secrets and Lies. Each installment focuses on a separate relationship and set of allegations. Dirty Secrets is specifically tied to a police family and to the question of what happens when the person accused of deception also holds public authority.

The internal-affairs material may make the institutional side more prominent than in a purely domestic story. At the same time, the most distinctive element is Nicole’s participation. Her account can show how revelations about a parent affect identity and memory, not only a marriage. For related coverage of digital deception and its effect on young people, see our guide to the Unknown Number: The High School Catfish cast.

Is Betrayal: Dirty Secrets based on a true story?

Yes. It is a nonfiction docuseries based on Karoline Borega’s family experience and on reporting developed through the Betrayal podcast. “Based on a true story” should not be read as a promise that every memory or interpretation is uncontested. Documentary episodes select interviews, records and chronology to build a narrative, and viewers should pay attention to how claims are attributed.

The official ABC News Studios release states that the season includes footage from a police internal-affairs investigation. That makes primary documentation part of the storytelling, but it remains important to separate the documentary’s presentation from a court judgment unless the series supplies specific legal findings. Our A Toxic Love Story true-story guide follows the same principle by distinguishing a streaming narrative from the underlying record.

Should you watch it?

Dirty Secrets is likely to appeal to viewers who prefer intimate, interview-driven true crime over reenactment-heavy mystery shows. Its central question is not “Who did it?” but how a family understands years of deception and moves forward. That can make the viewing experience emotionally heavier than a conventional investigation series.

The subject matter includes infidelity, alleged abuse of authority, sexual misconduct and family trauma. Viewers who may be affected by those themes should use the platform’s content information and decide whether the series is right for them. The most useful way to watch is to keep the focus on the participants’ agency rather than treating their experiences as entertainment alone.