Jo Nesbø’s Detective Hole Season 1 Ending Explained: Who Is The Killer?

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Be warned – this article reveals major spoilers for the first season of Jo Nesbø’s Detective Hole! After following the difficult cases and personal struggles of the show’s main detective, the Netflix series finally solves the core mystery of the central murder.

The Netflix series Detective Hole, based on Jo Nesbø’s novels, opens with a grim scene showcasing Harry Hole’s struggles with alcohol and his all-consuming dedication to his work. When a bank robbery occurs, Hole immediately jumps in his car to investigate, even though he’s drunk. A younger coworker joins him, but Hole crashes, resulting in the coworker’s death.

The Netflix thriller moves forward in time, showing Harry Hole attempting to rebuild his life and stay sober. He’s investigating a bank robbery that previously caused him immense personal hardship, but a new wave of murders quickly pulls him back into the darkness. This forces him to rely on his often reckless investigative methods, and he clashes with fellow detective Tom Waaler along the way.

How Detective Hole Realized Willy Was The Killer

Detective Harry Hole points out that, statistically, a wife’s husband is usually the one responsible for her murder. However, when Lisabeth is found dead, her husband, Willy, doesn’t fit the profile. He appears genuinely heartbroken and incapable of violence, so no one considers him a suspect.

Near the end of Jo Nesbø’s Detective Hole, Harry Hole realizes the connection when he learns fennel seeds were discovered under Lisabeth’s fingernail – a nail the killer later sent to the police. Remembering he saw Willy eating fennel seeds earlier, Hole figures out that Willy must have cut off Lisabeth’s finger after killing her and hid it somewhere unusual.

Willy agreed with Detective Hole’s conclusion. He explained he’d hidden the finger knowing the police might use dogs to track it, which confirmed Hole’s suspicion that the traces of fecal matter and fennel seeds under Lisabeth’s nail led back to him.

Why Willy Committed The Murders

Once Detective Hole cracked the case, Willy confessed to killing his wife. He explained that he’d discovered she was having an affair with a man named Martin – the same man who had tried to sell them star-shaped diamonds during a vacation they’d taken together.

After discovering his wife’s infidelity and the fact that she didn’t love him, Willy planned a series of crimes. He intended to make it look like Martin was responsible and to get back at his wife for her betrayal.

Willy initially contacted Martin and requested he secretly deliver weapons and star-shaped diamonds directly, avoiding anyone else. This arrangement meant Martin consistently appeared in town whenever Willy needed something delivered. Willy deliberately scheduled each murder to coincide with Martin’s arrival, hoping investigators would eventually notice the connection and suspect Martin.

He cleverly left star-shaped diamonds – the same ones Martin sold – at each crime scene. He also created misleading cassette recordings, disguising his voice to make it seem like Martin was the main suspect. This plan was successful, but he slipped up by sending the police his wife’s finger, unintentionally revealing he was manipulating the investigation and pointing them towards a killer.

The Deputy Chief Of Police’s Twist In Detective Hole’s Ending Explained

In the closing scenes of the show, after Hole solves a murder and uncovers Tom Waaler’s connection to illegal arms dealing, he’s asked by the Deputy Chief of Police to dig deeper into the smuggling operation and find any other officers involved. In a shocking turn of events, it’s revealed that the Deputy Chief herself is also part of the criminal network.

She ordered a temporary halt to the operation due to rising tensions in the city. This showed she’d only hired Harry Hole to investigate the weapons smuggling because she wanted to monitor him. Realizing he posed a significant risk to her plans, she decided it was smarter to keep him under close surveillance rather than confront him directly.

Jo Nesbø’s Detective Hole’s Post-Credits Scene Explained

The first season of Jo Nesbø’s Detective Hole includes a scene after the credits where Hole travels to the hometown of Tom Waaler to learn more about his history. He speaks with a local shopkeeper who knew Waaler as a child and discovers that Waaler had a difficult upbringing and an abusive father. The shopkeeper also remembers that Waaler’s father died under mysterious circumstances, suggesting Waaler may have been involved.

If the show gets a second season, it could delve into Waaler’s history and show how discovering more about him helps Detective Hole track down the individuals behind the illegal arms trade.

Why Tom Waaler Wanted Harry Hole To Kill Martin

Tom Waaler is stunned to discover Martin might be the killer, implying they have a close relationship. Driven by this realization, Waaler tries to kill Martin, but Beate intervenes just in time to prevent it.

Near the end of Jo Nesbø’s Detective Hole, Tom Waaler attempts to manipulate Harry Hole into killing Martin, arguing it’s the right thing to do. However, Hole suspects Waaler’s motives and pressures Martin to confess everything. Martin then reveals he used to smuggle weapons for Waaler.

Knowing Tom Waaler was involved in illegal arms dealing, the man hoped to lessen his murder sentence by informing the police. This made Waaler see him as a danger, and he decided to kill him before he could reveal what he knew.

Why Tom Waller Killed Ellen & Olsen

The series begins with Harry Hole reviewing footage from an old, unsolved bank robbery where a female employee was killed. The weapon used in the robbery points him towards a local gun dealer named Olsen. But before Hole can talk to Olsen, Olsen figures out the police are onto him and goes into hiding.

I was on the edge of my seat! At the police station, this new officer, Beate, spotted Waaler in some grainy security footage. Turns out, Waaler had been to see Olsen. And Beate wasn’t just guessing – she has an incredible memory for faces, way better than most people. So, Ellen and Harry took her seriously and immediately went to question Olsen, wanting to know what Waaler had been up to with him.

Waaler attempts to preempt his pursuers by going to Olsen’s hiding place intending to kill him. Ellen follows, but is discovered. To cover his tracks and protect his role in a weapons smuggling operation, Waaler kills Ellen and then falsely accuses Olsen of the murder. He then kills Olsen to eliminate him as a suspect.

Why Harry Hole Breaks Up With Rakel

At its heart, the story of Harry Hole revolves around his struggles with addiction. He’s addicted to both alcohol and his work as a detective, constantly consumed by unsolved cases – even when he tries to rest. This combination of dependencies is tragically demonstrated at the beginning of the story when it causes him to crash his car, resulting in the death of a colleague.

As the show neared its end, Hole began to believe he could finally overcome his drinking problem. But he knew he’d never be able to leave his dangerous line of work. Feeling responsible for the pain his job caused Rakel and their son, he ultimately decided they would be happier if he wasn’t in their lives.

Rakel makes it clear to Hole that he can’t dictate their morals, but he still pulls away. When he tries to reach out again, he discovers she’s blocked him completely.

How Willy’s Case Helps Harry Solve Another Murder Mystery

Now that the serial killer case was closed, Hole returned his attention to the bank robbery murder, which continued to haunt his thoughts, even appearing in his dreams. He remembered the robber speaking to the bank teller before the killing. Considering his previous insight that spouses are often involved in such crimes, Hole began to suspect the robbery was a disguise for a more personal motive, just like in the Willy case.

Reviewing the security footage removed all doubt, leading him to believe the robbery was actually a planned murder by the woman’s husband. This explained the robber whispering something to her and her shocked reaction right before she was killed.

How Jo Nesbø’s Detective Hole Season 1 Sets Up Season 2

The Netflix series Detective Hole is adapted from The Devil’s Star, the fifth book in Jo Nesbø’s Harry Hole series. With over ten Harry Hole novels available, Netflix has plenty of material to create more seasons if the show is successful.

The Netflix thriller also hints at what’s coming in season two, introducing the new Deputy Chief of Police as the main villain. Unlike the Prime Video series Reacher, which jumps around to different stories, this suggests the show will likely follow the sixth book, The Redeemer, in its next season.

Tom Waaler, played by Joel Kinnaman, died in the first season of Jo Nesbø’s Detective Hole, making a reappearance in season 2 improbable. However, the Netflix series could still show him through flashbacks as Harry Hole uncovers details about his history.

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2026-03-26 13:12