Netflix’s ‘The Final Problem’ Sets Release Date, Trailer, Plot and Cast Details

Netflix is heading into locked room mystery territory with a new Spanish language limited series that puts a meta spin on the detective genre. ‘The Final Problem’ is Netflix’s new miniseries based on Arturo Pérez-Reverte’s bestselling novel, and it centers on a man who only knows how to solve crimes because he once played a detective on screen.

The series has been building anticipation for months, and Netflix has now locked in its premiere window along with promotional footage and full casting details. The show is produced by Fernando Bovaira for Mod Producciones, with Urko Errazquin serving as executive producer. Here is a full rundown of when ‘The Final Problem’ arrives, what it is about, and who stars in it.

Release Date for ‘The Final Problem’ on Netflix

Netflix has confirmed that ‘The Final Problem’ will premiere on the platform on September 25. The series is set to premiere globally on a Friday, exclusively on Netflix. The confirmation ends months of speculation about when the adaptation would finally land after being announced.

Netflix produced the limited mystery series in partnership with Mod Producciones, with the project helmed by director Félix Viscarret. The screenplay was adapted by Alberto Macías, Carlos Molinero, and Marisol Farré, and all episodes were directed by Viscarret. That kind of singular directorial vision across the whole run is often a signal that a streamer wants a consistent tone throughout a limited series.

Reports differ slightly on the final episode count. One report describes the limited series as consisting of four episodes. Another describes it as a five episode whodunit. Either way, the format keeps the story tight rather than stretching the central mystery across a longer season order.

Trailer and First Look for ‘The Final Problem’

A date announcement trailer for the series was released on Netflix’s official YouTube channel ahead of a fuller trailer drop. Netflix’s official listing for the show includes both a teaser and a full trailer, labeled the Limited Series Teaser and the Limited Series Trailer. The footage leans heavily into atmosphere rather than action.

The tone of the promotional material leans into howling coastal winds, a crumbling old hotel, and a cast of increasingly paranoid guests. That approach fits the source material, which trades in slow dread rather than jump scares or violence. Fans of classic ensemble whodunits will likely recognize the visual shorthand immediately.

Netflix also released first look photography alongside the trailer material to build interest ahead of the September premiere. The images focus heavily on the hotel setting and the principal cast in period appropriate wardrobe. This kind of staggered rollout, teaser first and then a longer trailer, has become standard practice for Netflix’s international mystery and thriller slate.

Plot Details for ‘The Final Problem’

The story is set in the spring of 1959, when thirteen people find themselves stranded by a violent storm on a small island off the coast of Mallorca. At the secluded hotel where they are staying, Elisa Mander, a quiet English tourist, is found dead, and what initially looks like a suicide soon reveals itself to be something far more disturbing, a murder. That setup immediately narrows the suspect pool to the guests and staff trapped on site.

Basil, a retired actor who once portrayed Sherlock Holmes on the big screen, unexpectedly finds himself taking on the role of investigator. He joins forces with Foxá, an aspiring thriller writer, to search every corner of the hotel for answers, all while testing the composure of Mrs. Ausländer, the hotel’s manager. The premise plays on the idea of a man whose only real qualification is having once pretended to solve crimes for a camera.

In a place where no one can leave and no one can arrive, every guest and member of staff becomes a suspect in a crime that proves to be far more intricate and elusive than anyone could have imagined. The series blends a classic locked room structure with a meta twist on the detective genre itself. That combination of Agatha Christie style structure with a self aware lead character is what has drawn early comparisons to golden age mystery fiction.

The source novel itself has its own history worth noting for fans of the book. The original novel takes place in 1960 in Greece and follows a retired actor named Ormond Basil who is on holiday when a British tourist turns up dead. The television adaptation shifts the setting to 1959 in Mallorca rather than Greece in the 1960s.

Cast of ‘The Final Problem’

The series stars Jose Coronado, María Valverde, Martiño Rivas, and Maribel Verdú in the lead roles. Coronado plays Basil, Valverde plays Adela Figueroa, a mysterious young woman traveling with a friend, Rivas plays Foxá, the aspiring thriller writer, and Verdú plays Mrs. Ausländer, the hotel’s manager. That quartet forms the core of the investigation and the tension inside the hotel.

The cast is rounded out by Gonzalo de Castro as Fonseca, an ambitious film director, and Cristina Kovani, who plays a young and passionate actress. The ensemble also includes José Condessa and Pepón Nieto, among many others. Several of these actors bring recognizable resumes from Spanish television and film to a project aimed at a global audience.

Behind the camera, the creative team draws on experienced genre talent. Bovaira previously worked on projects including ‘Mientras dure la guerra’ and ‘La Fortuna’, while Errazquin’s prior credits include ‘El campeón’ and ‘La vida padre’. That background in prestige Spanish drama suggests Netflix is positioning ‘The Final Problem’ as a serious awards adjacent mystery rather than a disposable genre exercise.

Given the strength of this ensemble and the pedigree of Pérez-Reverte’s source material, ‘The Final Problem’ looks positioned to be one of Netflix’s more distinctive international mysteries this year, and once the storm hits that Mallorca hotel on September 25, viewers will likely have plenty to say about who they think actually killed Elisa Mander.