”All Her Fault” Finale: Jake Lacy Reveals Peter’s Darkest Secret and ‘Beautiful Delusion

In a revealing post-finale discussion, All Her Fault star Jake Lacy opened up about the tragic psychology behind his character, Peter, in Peacock’s gripping kidnapping drama. The actor spoke with TheWrap about navigating Peter’s moral ambiguity and the emotional collapse that defines the series’ conclusion.
The finale, released on November 12, 2025, left viewers shocked as Peter’s secret role in the kidnapping and baby swap came to light. Lacy described Peter’s mindset as a “sad, beautiful delusion” — a belief that his horrifying choices were acts of love.

What Happened in All Her Fault

Jake Lacy’s character, Peter, plays a central role in Peacock’s eight-part thriller All Her Fault, opposite Sarah Snook, who portrays Marissa. The story unravels a devastating family secret: after losing their infant in a car accident, Peter secretly replaces the deceased baby with another woman’s child — a decision that ignites the entire kidnapping saga.
As the truth surfaces, Peter’s desperation and deceit spiral into tragedy, culminating in a fatal confrontation. Despite his crimes, Lacy says Peter believed he was “completely justified,” viewing his actions as a form of emotional protection for his wife.

Quotes and Reactions

Speaking to TheWrap, Lacy reflected on the depth of Peter’s denial:

“There’s a sad, kind of beautiful delusion in Peter thinking he saved his wife from grief,” Lacy said. “He really thinks that was the right thing to do.”

Director Minkie Spiro encouraged Lacy to balance empathy and tension, ensuring Peter’s guilt remained layered. “We had constant discussions about how much complicity to reveal,” Lacy added, noting that his portrayal aimed to make viewers question Peter’s motives until the final episode.

Impact Analysis

The finale of All Her Fault reshapes the emotional core of the series. Lacy’s performance transforms Peter from a grieving father into a chilling example of moral collapse. Critics have praised his portrayal for its restraint and complexity, suggesting potential awards-season attention.
The show’s conclusion also reinforces Peacock’s growing presence in the psychological thriller space, drawing comparisons to The Undoing and Sharp Objects.

What’s Next for the Cast and Series

Following All Her Fault, both Jake Lacy and Sarah Snook are expected to receive major streaming offers for upcoming drama projects. While Peacock has not confirmed a second season, the finale’s unresolved emotional threads leave room for a possible continuation or anthology-style sequel.
All Her Fault remains available for streaming exclusively on Peacock.

Sources

• TheWrap Interview: Jake Lacy on All Her Fault

• Peacock Official Press Release

• Variety Review (November 2025)

• Deadline Entertainment News