All Her Fault Cast and Character Guide
The Peacock mystery-drama All Her Fault, released on November 6, 2025, has quickly captured attention. Adapted from Andrea Mara’s novel, it follows a chilling moment when Marissa Irvine discovers her young son Milo missing after what was supposed to be an ordinary playdate. The story unfolds into a tense unraveling of secrets, trust, and unexpected connections.
Plot Overview
Set in Chicago, the series explores the lives of Marissa and Peter Irvine as they are thrust into chaos. Detective Alcaras dives deep into their world—examining friendships, school relationships, and the hidden layers behind familiar faces. What begins as a missing child case becomes a reflection on how everyday people react when faced with extraordinary stress and fear.
Main Cast
- Sarah Snook as Marissa Irvine — A driven corporate mother whose life turns upside down when her son disappears. Snook, known for her Emmy-winning role as Shiv Roy in Succession, brings emotional depth to the part.
- Peter Irvine — Marissa’s husband, who must navigate suspicion, guilt, and the strain on his marriage as the search for Milo intensifies.
- Detective Alcaras — The investigator determined to uncover the truth behind Milo’s disappearance, connecting threads between parents, teachers, and caregivers.
Notable Performances
Sarah Snook delivers an exceptional portrayal of Marissa Irvine, displaying a balance of strength and vulnerability. Born in Adelaide, Australia, Snook has been acclaimed for roles in Predestination (2014), Pieces of a Woman (2020), and Run Rabbit Run (2021). Her performance anchors the series, making each plot twist gripping and emotionally charged.
“Not only does every actor in All Her Fault get their time to shine, but also, during the process, secrets are uncovered, relationships are put to the test, and parents get harsh realities about the people they trust with their kids.”
Summary
All Her Fault vividly combines a mystery’s suspense with emotional realism, powered by Sarah Snook’s stellar lead performance and sharp storytelling that keeps viewers on edge.
Author’s Summary: A gripping Peacock mystery where Sarah Snook’s nuanced performance drives a tense exploration of trust, fear, and the hidden truths behind family life.