Official Trailer for The Final Problem

The Final Problem is a four-episode Spanish mystery limited series set in an isolated island hotel near Mallorca in 1959. A retired actor once known for playing Sherlock Holmes investigates a suspicio

In the spring of 1959, a small island hotel near Mallorca is cut off from the outside world by a storm. Elisa Mander, a British tourist staying there, is found dead among the 13 guests, and what appeared to be suicide reveals the possibility of murder. The Final Problem uses the condition that no one can leave or enter this isolated space as the starting point for its mystery. Netflix released the four-part limited series on September 25, 2026.

Sherlock Holmes Offstage

Basil, played by José Coronado, is not an actual detective but a retired actor who once played Sherlock Holmes in films. When he finds himself having to uncover the truth behind a death at the hotel, he applies the observation and deduction methods of the role he played to a real-life case. María Valverde's Adela Figueroa and Martiño Rivas's aspiring thriller writer Fox become entangled with Basil, while the hotel manager, Mrs. Ausländer, also becomes a suspect.

A Locked-Room Mystery Set Within a Period Drama

Based on Arturo Pérez-Reverte's bestselling novel of the same name, the series combines the atmosphere of a period drama with a thriller and mystery structure. It was directed by Félix Viscarret and produced by Maud Producciones. Maribel Verdú, Gonzalo de Castro, Cristina Kovani, José Condessa, and Pepón Nieto join the ensemble, forming a lineup of suspects among the hotel's guests and staff.