All Her Fault ending explained, release schedule and how to watch
Inspired by Andrea Mara’s novel, All Her Fault season 1 explores a mother’s search for her missing son and the shocking truths hidden in her family’s past. The series stars Sarah Snook as Marissa Irvine, with Dakota Fanning, Jake Lacy, and Michael Peña in key roles.
All Her Fault ending explained: Why did Carrie take Milo?
In the final episode, Carrie Finch’s real identity is revealed as Josephine Murphy. She abducted Milo because he was her biological son, switched at birth after a fatal car accident years ago involving Peter and Marissa Irvine.
Carrie never intended to harm Milo. During a tense confrontation, Peter shoots her to stop her from exposing the truth. She dies, leaving Marissa to discover that Peter had swapped their deceased baby with Carrie’s newborn after the crash.
Peter’s deception unravels when Marissa listens to Carrie’s recording, revealing Peter killed Carrie’s father to conceal his crime. Carrie had tracked them down, believing Milo was hers, which proved true.
What happens to Peter in All Her Fault?
After Carrie’s death, Peter tries to convince Marissa that his actions were justified, claiming he saved them from grief. But Marissa uncovers his lies and plans revenge.
Later, Peter dies of an allergic reaction when Marissa deliberately replaces his EpiPen with an expired one. Detective Alcaras confirms his death and later realizes that Marissa intentionally caused it but lets the case close without pressing charges.
What happens to Marissa and Milo?
Following Peter’s death, Marissa protects Milo and moves on. Detective Alcaras learns that both Milo and Carrie shared a neurological condition called synaesthesia, confirming their biological connection.
In the final scene, Marissa is seen with Milo visiting Jenny, living peacefully. Although the detective knows what really happened, he chooses to leave the case closed, recognizing Marissa’s suffering and moral dilemma.
All Her Fault release schedule and how to watch in US, UK and Ireland
All Her Fault premiered in the United States on Peacock on Thursday, November 6, 2025with all eight episodes released simultaneously.
In the UK and Irelandthe series is available on Sky and NOW from Friday, November 7, 2025.
To stream on Peacock, viewers need an active subscription. The Basic Plan costs $7.99 per monthwhile the Premium Plan costs $10.99. For ad-free viewing, the Premium Plus Plan is $16.99 per month. Annual plans are also available.
All Her Fault cast and characters
- Sarah Snook as Marissa Irvine
- Jake Lacy as Peter Irvine
- Dakota Fanning as Jenny Kaminski
- Michael Pena as Detective Alcaras
- Sophia Lillis as Carrie Finch / Josephine Murphy
- Abby Elliott as Lia Irvine
- Daniel Monks as Brian Irvine
- Jay Ellis as Colin Dobbs
- Thomas Cocquerel as Richie Kaminski
- Duke McCloud as Milo Irvine
- Kartiah Vergara as Ana Garcia
All Her Fault based on a true story?
All Her Fault is inspired by author Andrea Mara’s real-life experience. She once arrived at an address to collect her child after a playdate, only to find the family had moved away. This event inspired her to write the novel.
The book differs slightly from the series, focusing more on the mystery and guilt among mothers. The show adapts the story into a thriller exploring deception, grief, and moral choices.
All Her Fault production details and themes
Created by Megan Gallagher, All Her Fault examines parental fear and the impact of lies. Executive producer Joanna Strevens explained that the series was designed not as a “whodunit” but as a “whydunit.”
The story explores how grief, guilt, and secrecy intertwine within families. It also raises questions about blame and judgment in modern society, especially directed toward mothers in crisis situations.
All Her Fault streaming and viewing details
All Her Fault season 1 is available to stream on Peacock in the US and on Sky and NOW in the UK and Ireland. It consists of eight episodes and is currently a limited serieswith no confirmation of a second season yet.
FAQs
Q1: How many episodes are there in All Her Fault season 1?
There are eight episodes in All Her Fault season 1. All episodes were released together on Peacock and Sky on November 6 and 7, 2025.
Q2: Is All Her Fault based on real events?
The series is inspired by Andrea Mara’s personal experience, where a brief mix-up during a playdate inspired the novel. The TV version adds fictional drama and mystery elements.