Is Nocturne a true story? Jurek Walter's creators borrowed one idea from The Silence of the Lambs

Nocturne premiered on Apple TV on October 30, 2026, with two episodes, and the 10-episode season runs weekly until the finale on December 25. Stephen Graham plays Walter, the killer at the center of it, opposite Liev Schreiber and Zazie Beetz. The show feels pulled from a true-crime podcast, but its villain started life in a pair of Swedish novels by a married couple, one of whom had nightmares about him almost every night while they wrote.

So no, Nocturne isn't a true story. Here's where Walter actually comes from.

The books behind Nocturne

Walter is Jurek Walter, the serial killer of Lars Kepler's Joona Linna novels. Lars Kepler is the shared pen name of Alexander Ahndoril and Alexandra Coelho Ahndoril. The show mainly adapts The Sandman (2012) and draws on its companion novel Lazarus (2018), with a few big changes:

• The setting: Sweden becomes western Pennsylvania. The show filmed in Allegheny, Beaver and Butler counties, and its fictional town, Fairhaven, sits northwest of Pittsburgh.
• The detective: Joona Linna becomes Jonah Lynn (Schreiber), an ex-soldier and retired Philadelphia homicide detective who moved out of the city for a quiet life.
• The agent: Saga Bauer (Beetz) keeps her name, but now she's an FBI agent, and Apple's synopsis calls her Jonah's "surrogate daughter."

The premise survives the move intact. A victim of the notorious killer turns up alive years later, the police suspect people are disappearing again, and Saga goes undercover to get answers from Walter himself, taking the room next to his.

Is Jurek Walter based on a real serial killer?

No. Kepler built him from research, not from a case. The couple talked to doctors, psychiatrists, caregivers, criminologists and police officers and studied real serial killers, and they've said the ones that interested them most were the ones who came across as very intelligent.

"We never use real killers or cases in our novels since they also have real victims and families."

— Lars Kepler, to Crime by the Book

What filled in the rest was fear. Kepler told the same interviewer that after the research, they "searched deep within our own fears and let Jurek Walter take shape." In another 2018 interview, with The Real Book Spy, they said Walter felt so real while they were writing that Alexandra had nightmares about him almost every night.

The Silence of the Lambs idea

The one thing Nocturne clearly shares with The Silence of the Lambs is its central setup: a young woman from law enforcement sent in close to a brilliant, locked-up killer because he's the only one who might know where a missing person is. In Thomas Harris's story it's Clarice Starling and Hannibal Lecter. In Kepler's, it's Saga Bauer going undercover in the maximum-security psychiatric hospital where Jurek Walter is held.

Don't miss: Who is Sam in Nocturne? Jurek Walter answered that in court years ago

Kepler's own interviews talk about real killers and their own fears rather than Harris. But the comparison has followed Walter from the start. Lee Child's blurb for The Sandman called reading it "like meeting Hannibal Lecter all over again," and the reviews of the show reach for the same movie.

Nocturne borrowed the visit from The Silence of the Lambs. The killer it puts behind the glass is Kepler's own.

Not every critic thinks the borrowing pays off. Forbes' Erik Kain wrote that the show wants to be "the love child of Silence of the Lambs and True Detective" and called it "tropey, implausible, badly paced and sloppy." Graham, at least, sounds unbothered by the darkness of the part. He told Collider he's "completely comfortable with my darkness," which is one way to prepare for living next door to Saga Bauer until Christmas Day.

Previously we wrote: Sony's Sleepy Hollow has Sydney Sweeney and Nicholas Galitzine. The Headless Horseman is the third wheel now