Happy Valley Star Sarah Lancashire Returns to Dark Crime Drama in Netflix’s Chilling Six-Part Thriller About a Mother Convicted of Killing Her Children

Sarah Lancashire is preparing for what could be her darkest television role yet. The three-time BAFTA-winning Happy Valley actress will play a mother returning home after 30 years in prison for the deaths of her three young daughters — only to find herself at the centre of a terrifying new murder mystery. And with the acclaimed writer behind the project promising gothic horror, family secrets and a deeply emotional story, Netflix’s upcoming six-part thriller is already shaping up to be one to watch.

For viewers who still remember Sarah Lancashire’s extraordinary performance as Sergeant Catherine Cawood in Happy Valley, the prospect of seeing her lead another intense crime drama is particularly exciting.

But her new Netflix series, Witch Hunt, promises something very different.

Rather than playing the determined police officer fighting to protect her community, Lancashire will portray a woman whose return to society threatens to reopen one of the darkest chapters in a small university town’s history.

The six-part drama comes from acclaimed screenwriter Abi Morgan, who has been hoping to reunite with Lancashire for more than two decades.

And the character at the centre of the story could be among the most complicated of the actress’s career.

A Mother Returns Home After 30 Years in Prison

In Witch Hunt, Lancashire plays August Howell, a woman convicted of drowning her three young daughters.

After spending three decades behind bars, August is finally released.

But returning home offers little comfort.

The community has not forgotten what happened, and many residents are unwilling to accept her presence.

August also faces the painful challenge of reconnecting with her last surviving daughter, Professor Wren Howell.

Wren has built a career as an academic and investigative psychologist, but her mother’s return threatens to bring buried family trauma back into her life.

Their relationship lies at the emotional heart of the series.

Yet the story becomes even more unsettling when a new danger emerges.

A Serial Killer Brings Fresh Terror to the Town

As August attempts to rebuild her life, a serial killer begins terrorising the university town.

Concerns grow that her return may have triggered a modern-day witch hunt, with old suspicions and local resentments resurfacing.

The police turn to Wren for assistance in identifying the killer.

Her expertise as an investigative psychologist could prove crucial.

But helping the investigation also means confronting the painful history surrounding her own family.

The series draws another layer of mystery from August’s ancestry.

She is described as a descendant of the Witch of Cambridge, a connection that brings local folklore and modern fears into the same story.

As the investigation develops, the boundaries between the town’s past and present become increasingly tangled.

And beneath the central crime mystery lies an equally difficult question: can August ever be forgiven for what she did?

The Writer Has Wanted to Work With Sarah Lancashire Again for 25 Years

One of the most intriguing aspects of Witch Hunt is the creative partnership behind it.

The series is written by Abi Morgan, whose previous collaboration with Lancashire dates back to the 2000 crime drama My Fragile Heart.

Morgan revealed that she had spent more than 25 years searching for the right opportunity to work with the actress again.

And she believes she has finally found it.

“I have been chasing the perfect role for Sarah since we last worked together more than 25 years ago,” Morgan explained.

“This is it.”

She added that she couldn’t imagine anyone better suited to portraying the character’s unsettling combination of vulnerability and darkness.

Morgan described August as embodying the terrifying tenderness of the Witch of Cambridge, suggesting a role that will require Lancashire to explore deeply conflicting emotions.

For an actress already celebrated for portraying complex women, it represents a formidable challenge.

Gothic Horror Meets an Emotional Family Drama

Although Witch Hunt centres on a serial killer investigation, Morgan has made clear that the story is about more than solving a crime.

She described the series as a dark, emotionally charged love story between August and the daughter she left behind.

That description points toward a drama concerned with guilt, forgiveness and the lasting consequences of family tragedy.

The writer also promised a distinctive blend of genres.

“It’s gothic horror meets dark thriller laced with modern day witchcraft,” Morgan said.

The combination of a notorious family history, a frightened community and a contemporary murder investigation gives the series an unusual premise.

And the mother-daughter relationship promises to make the mystery intensely personal.

Rather than simply following detectives as they search for a killer, the drama will examine what happens when the past refuses to remain buried.

Sarah Lancashire Calls the Story Utterly Compelling

Lancashire herself has expressed enthusiasm for the project.

The actress described Witch Hunt as a brilliantly imagined and utterly compelling story, praising the complexity of the woman she will portray.

“There’s so much to explore in August, and I can’t wait to begin,” she said.

It is easy to understand why the role appealed to her.

In Happy Valley, Lancashire won widespread acclaim for portraying Catherine Cawood, a police sergeant whose personal grief and professional responsibilities were inseparable.

Her performance earned her three BAFTAs for the series and established Catherine as one of British television’s most memorable crime-drama characters.

Witch Hunt will allow Lancashire to approach similarly intense material from a dramatically different perspective.

This time, she won’t be the person investigating a traumatic crime from a position of authority.

She will be the convicted woman whose past has left an entire community divided.

Black Doves Producer Praises Lancashire’s Talent

The project also reunites Lancashire with executive producer Jane Featherstone, whose credits include Netflix’s Black Doves.

Lancashire also appears in that spy thriller, giving viewers another opportunity to see her working within a dark, suspenseful story.

Featherstone expressed confidence that the actress is the ideal choice for August Howell.

“I’ve been lucky enough to work with Sarah Lancashire over the past few years, and she still surprises me every time,” she said.

“She is extraordinary, and I’m thrilled she’ll be playing August.”

With Morgan writing and Lancashire leading the cast, the new series brings together creative talent with an established reputation for emotionally demanding drama.

When Will Witch Hunt Be Released on Netflix?

Netflix is currently expected to release Witch Hunt in 2028.

An exact premiere date has not yet been announced.

Further casting details also remain under wraps, including who will portray Professor Wren Howell and the other characters drawn into the town’s murder investigation.

The six-part format suggests a tightly focused story, combining the central crime mystery with August’s attempt to reconnect with her surviving daughter.

For fans of Happy Valley, the series offers a particularly compelling reason to keep an eye on Netflix’s upcoming drama slate.

But its premise also has the potential to attract viewers who enjoy atmospheric psychological thrillers, unsettling family secrets and mysteries rooted in local folklore.

Sarah Lancashire has already proved she can make audiences feel every moment of a character’s pain, determination and vulnerability. Now, with a mother convicted of an unimaginable crime, a daughter struggling with the past and a killer spreading fear through an entire town, Witch Hunt could give her one of the most challenging performances of her career.