Outlander star Lauren Lyle takes the lead in a dark BBC thriller where a woman returns to New Zealand for her estranged sister’s wedding — only to discover that her sister is dead. What looks like a tragic accident soon turns into a haunting search for the truth, pulling Mia into buried secrets, a bitter environmental dispute, a suspicious fiancé and a community where everyone seems to have something to hide. With addiction, family trauma and murder colliding, the six-part mystery feels like Broadchurch meeting Happy Valley on the other side of the world. Viewers have called it a “must watch,” while one fan said Lauren Lyle’s performance “sent shivers down my spine.”

The Ridge: Outlander Star Lauren Lyle Leads BBC Crime Drama Leaving Viewers With ‘Shivers’

A dark BBC crime drama starring Outlander actress Lauren Lyle has been drawing strong reactions from viewers, with some calling the six-part thriller a “must watch” and praising its unusual setting and gripping mystery.

The Ridge first aired on the BBC in October 2025 and is currently available to stream for free on BBC iPlayer.

Lauren stars as Mia who has an addiction problem

A Sister’s Death Raises Disturbing Questions

Lyle plays Mia, a woman attempting to rebuild her life after struggling with addiction and the collapse of her professional career in Scotland.

Her plans change when she travels to New Zealand after receiving an invitation to the wedding of her estranged sister, Cassy. But when Mia arrives, she discovers that Cassy has died before the ceremony can take place.

What initially appears to have been an accident soon begins to raise questions. Mia becomes determined to find out what really happened, pulling her deeper into the secrets and tensions of the small community where Cassy lived.

Her investigation becomes even more complicated when she develops an attraction to Cassy’s fiancé, Ewan.

A Community Full Of Secrets

As Mia starts looking into her sister’s life, she discovers that Cassy, a committed environmentalist, had been involved in a bitter dispute with local farmers.

There are also signs that Cassy’s relationship with Ewan may have been far less happy than it appeared from the outside.

The more Mia uncovers, the more convinced she becomes that her sister did not simply fall to her death — and that someone may have wanted her gone.

At the same time, Mia is dealing with problems of her own. She is struggling with a secret opioid addiction while her supply is running out, and unresolved professional misconduct charges continue to hang over her.

She is also haunted by a tragic incident from her childhood, making her investigation into Cassy’s death increasingly personal.

The Search For The Truth

The Ridge

The BBC’s story description follows Mia as she becomes increasingly entangled in the town’s web of lies, secrets and tensions.

Determined to understand what happened to her sister, she continues digging into the community’s buried conflicts. But as her search intensifies, the relationships and rivalries surrounding Cassy begin to put the fragile fabric of the town under pressure.

The series was filmed across both Scotland and New Zealand, giving the thriller a distinctive backdrop for its murder mystery and psychological drama.

Lauren Lyle’s Performance Stands Out

Critics have also responded positively to the series. The Guardian awarded The Ridge four out of five stars, describing it as a “hugely layered” and “masterly” drama.

Viewers have particularly singled out Lyle’s performance, as well as the show’s unusual location and six-episode structure.

One viewer praised the series for feeling different from other recent dramas, highlighting its setting, characters and carefully paced narrative.

Another said Lyle’s performance was a major reason they remained engaged, adding that the series “sent shivers down my spine.”

A third viewer acknowledged some flaws and questioned parts of the acting, but still praised Lyle as “absolutely brilliant” and described the thriller as thoroughly enjoyable.

Lauren Lyle in The Ridge

Stream All Six Episodes On BBC iPlayer

Combining a murder mystery with family secrets, addiction and psychological drama, The Ridge offers a six-episode story built around Mia’s increasingly desperate search for answers.

For viewers looking for a crime thriller with a different setting and a strong central performance, the Lauren Lyle-led series is currently available to watch for free on BBC iPlayer.