“The Final Problem” Ending Explained: Who Killed Elisa?

**Netflix’s ‘The Final Problem’: A Mysterious Journey of Identity and Intrigue**

Netflix’s latest miniseries, ‘The Final Problem’, made its debut in September 2026, drawing inspiration from Arturo Pérez-Reverte’s celebrated 2023 mystery novel. The series presents a captivating blend of suspense and unexpected romance that keeps viewers guessing until the very last moment.

Set on a remote island, the story centres around Basil, a retired actor renowned for his portrayal of Sherlock Holmes. As fate would have it, he becomes embroiled in a real-life murder investigation when a tourist named Elisa Mander is discovered dead at the hotel where he is staying. A fierce storm leaves the guests stranded, and with everyone under suspicion, Basil must navigate the complexities of human nature and deception to unearth the truth among the twelve remaining guests.

José Coronado, who brings the character of Basil to life, elaborated on the show’s unique narrative approach. In an interview with EFE, he described the series as not merely entertainment but a puzzle that encourages audience engagement. As Basil delves deeper into the case, the layers of mystery become increasingly intricate, revealing that not everything is as it seems.

As the thrilling plot unfolds, the focus turns to the true identity of the murderer’s accomplice. While several guests are suspected, it is ultimately revealed that Adela Figueroa, portrayed by María Valverde, is responsible for Elisa’s death. In a web of lies, she orchestrates a scene to make it appear as though Elisa took her own life. The series takes a darker turn when it is uncovered that Adela also eliminated the doctor who examined Elisa and who intended to blackmail her, as well as a German tourist linked to a tragic past involving her husband, a pilot executed during World War II.

A significant theme within ‘The Final Problem’ revolves around the quest for understanding and identity. Coronado pointed out the importance of not only discovering the murderer but also grasping the motivations behind their actions. This essential questioning adds depth to the narrative and invites viewers to reflect on the characters’ intertwined lives.

As the plot reaches its climax, Basil uncovers shocking revelations about Elisa’s past. He learns that the woman he believed to be his former love, Adela, is actually Elisa, who had stolen Adela’s identity in a bid to escape her own life. The two had exchanged roles for personal gain; however, Elisa’s aspirations ultimately led to murder.

The fourth and final episode sees Basil piecing together the clues that unveil the tangled identities. During a recreative film set, he realises he overlooked critical evidence that signifies foul play. This revelation is pivotal in grasping not just the sequence of events surrounding Elisa’s demise but also her true identity. The climax unfolds when Basil discovers an identity card, leading him to connect the dots to the two women’s swapped lives.

In an unexpected twist, during a final confrontation, Elisa nearly ends Basil’s life but instead chooses to reveal her long-kept secret: they had previously been romantically involved before he ghosted her. This shocking admission prompts Basil to reconsider his intentions, deciding not to immediately turn her in for the string of murders. Their dynamic evolves from an adversarial exchange to a complex emotional moment, leaving both characters in a precarious and unresolved situation.

Coronado has been outspoken about ‘The Final Problem’ being a love story at its core, albeit one that diverges from traditional narratives. He emphasised the character complexities, referring to Basil and Elisa as ‘cold characters’ whose relationship is built on intellect and mutual admiration. Their interactions illustrate a profound connection that transcends the surface-level thriller aspects of the plot.

As the series concludes, viewers are left with lingering questions about morality, justice, and identity. With its intricate storytelling and multidimensional characters, ‘The Final Problem’ offers a unique take on the classic murder mystery framework, encouraging audiences to reflect on the characters’ motivations and the consequences of their actions. Whether it is a tale of love or betrayal, the series leaves a compelling mark, prompting discussions long after the credits roll.