In the world of acting, there's a curious phenomenon where performers sometimes find it hard to shake off the characters they've embodied. But for one retired star, that very struggle becomes the key to unlocking a deadly mystery in Netflix's upcoming limited series.
The Final Problem, a four-part period thriller, is set to premiere on September 25, 2026. The show transports viewers to 1959, where a group of strangers is trapped on a remote island near Mallorca, Spain, by a raging storm. When one of the guests, a quiet Englishwoman named Elisa Mander, is found dead, the initial assumption is suicide. However, a closer look reveals telltale signs of foul play.
Enter Basil, a former actor who once portrayed Sherlock Holmes on the silver screen. With no one else having any detective experience, Basil is reluctantly drawn into the investigation. As he digs deeper, he discovers that nothing is as it seems, and every guest harbors secrets that could make them the killer.
The series is based on the novel by acclaimed Spanish author Arturo Pérez-Reverte and has been adapted for television by Alberto Macías, Carlos Molinero, and Marisol Farré. Félix Viscarret directs all episodes, ensuring a cohesive and atmospheric vision.
Leading the cast is José Coronado as Basil, alongside María Valverde, Martiño Rivas, Maribel Verdú, Gonzalo de Castro, Cristina Kovani, José Condessa, and Pepón Nieto. The ensemble promises to deliver a gripping whodunit with plenty of twists.
The trailer, already released, teases Basil's reluctant involvement. He notices inconsistencies in the apparent suicide—like the victim being dressed as if for a special occasion—which fuels his suspicion. His attempts to investigate are met with resistance, as the other guests are wary of being accused. Some even mock him for trying to relive his glory days as the famous detective.
As the storm rages on and tensions rise, the question remains: who killed Elisa Mander? And will Basil's theatrical instincts be enough to unmask the culprit before anyone else falls victim?
For fans of classic murder mysteries with a modern twist, The Final Problem is a must-watch. If you're looking for more thrilling content, check out our list of Netflix's September 2026 must-watch movies or explore other streaming thrillers that will keep you on the edge of your seat.
Mark your calendars for September 25, 2026, and prepare for a mystery that will challenge everything you think you know about Sherlock Holmes.
