The Final Problem: Netflix’s New Sherlock-Inspired Spanish Mystery Sets September Release

Mystery lovers, mark your calendars. Netflix’s brand new Spanish miniseries The Final Problem, adapted from Arturo Pérez-Reverte’s bestselling novel, has officially locked in its premiere date, and it’s shaping up to be one of the season’s most stylish whodunits.

When Does The Final Problem Release?

The five-episode series arrives on Netflix on September 25, 2026, with a date announcement trailer already live on Netflix’s official YouTube channel.

What Is The Final Problem About?

Set in the spring of 1959, the story follows thirteen guests trapped on a remote island off Mallorca’s coast after a violent storm cuts them off from the mainland. When a British tourist is found dead in what first looks like a suicide, suspicions of murder quickly take hold. A retired actor once famous for playing Sherlock Holmes on screen unexpectedly becomes the group’s real-life detective, teaming up with an aspiring thriller writer to investigate every guest at the isolated hotel while the property’s manager tries to keep the situation under control.

Who’s In The Cast?

The series is led by José Coronado in the Holmes-inspired role, alongside María Valverde, Martiño Rivas, and Maribel Verdú. The supporting cast includes Gonzalo de Castro, Cristina Kovani, José Condessa, and Pepón Nieto. Félix Viscarret directs from a screenplay adapted by Alberto Macías, Carlos Molinero, and Marisol Farré, produced by Fernando Bovaira for Mod Producciones.

Sherlock Holmes remains one of literature’s most enduring detective figures, inspiring countless adaptations across film and television — you can read more about the character’s legacy on Wikipedia.

For more Netflix release dates, first looks, and mystery-thriller updates, check out TechnoSports’ entertainment section.

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