Everything to Know About The Final Problem: Netflix is bringing The Final Problem to the screen, and the upcoming Spanish mystery thriller is an amalgamation of a locked-room murder mystery and old-school detective drama.
This four-episode mini-series is based on Arturo Pérez-Reverte’s bestselling novel of the same name and arrives on Netflix on September 25, 2026.
Everything to Know About The Final Problem: What Is It About?
The Final Problem is set in 1959 and begins with thirteen people stranded on a small island near Mallorca after a violent storm. The group is staying in a secluded hotel when Elisa Mander, a quiet English tourist, is found dead. Her death initially appears to be a suicide, but things quickly stop adding up, and what seemed to be a tragic death appears to be a murder.
The catch is that nobody can leave or reach there; thus, every guest and employee becomes a suspect in a crime that proves to ve complex and intricate than anyone could have imagined.
In a place that no one can leave and no one can reach, every guest and employee becomes a suspect in a crime that, with each passing moment, proves to be far more complex and intricate than anyone could have initially imagined.
The Sherlock Holmes Angle
Basil, played by Jose Coronado, is a retired actor who once portrayed Sherlock Holmes on the big screen. So the man who spent part of his career pretending to be one of the most famous detectives now has an actual crime scene in front of him.
Basil is not looking for another “acting role”; he unexpectedly finds himself in the role of the investigator when Elisa Mander’s death starts looking suspicious.
Although Basil knows what a detective is supposed to look for and the performance, there is no script or director is shouting “Cut” here.
The Final Problem Cast: Who Is In It?
According to Netflix, the mini-series stars “Jose Coronado (The Truthers, The Snow Girl), María Valverde (Sounds Like Love, All We Cannot See), Martiño Rivas (Snakes and Ladders, Cable Girls) and Maribel Verdú (Pan’s Labyrinth, Elite)”. The series also has a stacked Spanish ensemble as listed by Netflix: “Gonzalo de Castro (Políticamente incorrectos, La ternura), Cristina Kovani (Muted, La caza: Guadiana), José Condessa (Cacau, Turn of the Tide) and Pepón Nieto (Smiley, A Remarkable Tale ), among others”.
Who Created The Final Problem
This mini-series is directed by Félix Viscarret, while Alberto Macías, Carlos Molinero, and Marisol Farré have been credited with screenwriting.
Fernando Bovaira serves as producer, and Urko Errazquin as the executive producer. The Final Problem is produced by Mod Producciones.
What Happens in The Final Problem Trailer?
The trailer sets up the central mystery without giving away the direct answer. It introduces us to the secluded setting, the group in the storm and the death that changes the breeze.
What initially appears to be a tragic death starts looking like something dark, and suddenly the hotel becomes less of a place to stay and more like an interrogation room. The trailer also puts Basil at the centre of the investigation, leaning into the wonderfully strange irony of watching a former Sherlock Holmes actor pull out the detective’s coat.
Is The Final Problem Based on a Book?
Yes, the mini-series is based on a bestselling novel by Arturo Pérez-Reverte.
Netflix describes the adaptation as “a period thriller packed with secrets, mystery and unexpected twists”, blending thriller and mystery against an immersive period backdrop.
The Final Problem is a four-episode mini-series.
When Does The Final Problem Release?
The Final Problem releases on September 25, 2026, on Netflix. It is listed as a Spanish TV drama and a show based on a book.
This mystery-crime thriller is also stated to be “suspenseful”.
Why Should We Be Curious?
The thing that makes The Final Problem stand apart from the endless stream of murder mysteries is not simply the murder but the person solving it.
Basil is not really Sherlock Holmes; he only played him, and that difference could perhaps be the entire point. There is a question that rests behind the murder mystery: what happens when someone who has spent years performing a fictional detective actually finds himself in the centre of a real crime investigation, which might be an interesting starting point.
The Final Problem releases on 25th September 2026 on Netflix.
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