Netflix's 'The Final Problem' Channels Classic Holmes on a Spanish Island

Get ready for a classic murder mystery served with a side of meta-commentary. Netflix's latest Spanish import, The Final Problem, plunges viewers into a secluded island setting where a series of suspicious deaths mirrors the very stories its protagonist once brought to life. Premiering on September 25, 2026, this four-episode miniseries adapts Arturo Pérez-Reverte's novel, offering a compact yet compelling whodunit for binge-watchers.

The story centers on Benjamin Basil (played by the venerable José Coronado), an aging Spanish actor whose career highlight was portraying Sherlock Holmes in a series of film adaptations. Now somewhat adrift and barely sober, Basil finds himself on the remote Santa Agueda island off the coast of Mallorca. He's there to discuss a potential new role with a producer friend, but the idyllic setting quickly sours when a stormy night reveals a body hanging from a rope. What initially appears to be a suicide is, through Basil's keen, Holmes-esque observations, quickly revealed to be murder. With a cast of bourgeois suspects, including a new starlet and the no-nonsense hotel manager, no one is safe, and Basil must channel his iconic detective persona to uncover the truth.

A Method Actor's Mystery

The core conceit of The Final Problem is brilliant: an actor who has played Sherlock Holmes now finds himself in a situation demanding the detective's legendary deductive skills. This isn't just a man investigating a crime; it's a performer embodying his most famous role to survive. José Coronado, known for his commanding presence in shows like The Snow Girl, brings a seasoned gravitas to Basil, making the transition from actor to amateur sleuth utterly believable. The ensemble cast, including Maribel Verdú as the formidable Mrs. Ausländer and Martiño Rivas as the aspiring crime novelist Francisco Foxá, adds further depth to the confined setting, where every character harbors potential secrets.

Island of Secrets and Suspicion

The Final Problem leans into the tropes of classic Agatha Christie-style mysteries, but with a distinctly Spanish flair and the added layer of its lead's unique background. The isolated island setting is crucial, trapping the characters together and amplifying the tension with each passing hour. As Basil delves deeper, the line between his celebrated past and the perilous present blurs. The series promises a tightly plotted narrative, where the claustrophobic environment and the limited suspect pool create an intense atmosphere. Fans of intricate puzzles and character-driven thrillers will find much to savor as they try to piece together the clues alongside Basil.

What's Next

With its compact four-episode run, The Final Problem is perfectly suited for a weekend binge. Viewers can expect a satisfying conclusion that ties up the mystery while exploring the fascinating psychological landscape of its protagonist. Keep an eye out for further details on potential international availability beyond Netflix's initial release on September 25, 2026.