Unspeakable Sins cast and character guide: Who plays whom in the hit Netflix thriller?

Netflix’s Unspeakable Sins is a Spanish-language thriller series that revolves around the Martinez family and the dark secrets hiding behind their wealth and power. Season 1 opens with the kidnapping of Claudio, a powerful hotel tycoon whose rise to the top was built on blackmail, manipulation, and betrayal. The show dives deep into the fallout of his disappearance, as everyone from his wife to his business rivals to law enforcement officers scrambles to either protect or expose the truth.

At the heart of Unspeakable Sins is a tangled web of corruption, family trauma, and buried resentments. The series isn't a crime procedural; it’s about what happens when people finally turn on the man who kept them under his thumb for years.

Characters like Helena, Ivan, Octavio, Livia, and Fedra each bring a personal stake to the chaos, and most of them have either lost something to Claudio or want something he still controls.

The cast is a mix of seasoned performers and rising talents who bring serious weight to every scene. Their performances feel grounded and natural, which makes the show’s betrayal-heavy plot feel even more intense. Each character has their own complicated backstory, which becomes clearer as the series unfolds.

Breaking down the cast of Netflix’s Unspeakable Sins

Erik Hayser plays Claudio Martinez, the cold and calculating hotel magnate whose downfall triggers the events of the series. Claudio built his empire by controlling others, hiding scandals, and using personal information as leverage. He shows respect only to his daughter, Livia, while constantly dismissing his son, Octavio, and intimidating everyone around him. Hayser delivers a performance that doesn’t ask for sympathy, making Claudio’s eventual death feel like a natural consequence of the way he treated people.

Zuria Vega plays Helena, Claudio’s wife. Helena begins as a woman who seems untrustworthy, but it becomes clear she’s been surviving in a marriage defined by control and manipulation. She’s sharp, strategic, and focused on protecting her son, Fer. Vega plays her with balance—switching between vulnerability and cold resolve—especially in scenes where she conspires against Claudio or confronts her past.

Andrés Baida plays Iván, a young male escort who becomes involved with Helena. Iván doesn’t enter the story looking to stir chaos, but his relationship with Helena sets off a chain of consequences. Baida plays him as someone honest and grounded, unwilling to manipulate Livia despite her feelings for him. Iván wants a better life, and Baida keeps his performance low-key but firm in key emotional scenes.

Octavio, Claudio’s son, is played by Daniel Martínez. Octavio spends most of the season trying to prove himself to a father who openly belittles him. His lack of confidence becomes one of the show's quieter storylines. After Claudio’s death, Octavio steps into a leadership role, though it’s clear he’s still searching for direction. Martínez handles the internal conflict well, showing restraint even when the pressure rises.

Livia is played by Renata Notni. She is Claudio’s daughter from his first marriage, and he clearly favors her. She’s intelligent, loyal, and emotionally invested in keeping her father’s legacy intact. However, her affair with Antonio and her complicated feelings for Iván pull her into dangerous territory. Notni gives Livia both authority and emotional depth, especially when she begins to question everything her father built.

Fedra in Unspeakable Sins, played by Lisa Owen, is a former socialite whose son Ariel took his own life after being rejected by Claudio. Fedra wants revenge and enlists help to bring down the Martinez empire. Her daughter Ximena, played by Iliana Fox, assists in the plan but ends up dead, escalating the war between families. Owen portrays Fedra as grieving but vengeful, always ready to push things further.

Antonio, Claudio’s security chief in Unspeakable Sins, is played by Martín Altomaro. His motives are tied to personal betrayal and unrequited love for Livia. He joins Fedra’s plot, not out of ambition, but because he feels discarded. Altomaro makes Antonio unpredictable without turning him into a villain.

Finally, Sofía, the pregnant detective, is played by Mayra Batalla. She’s driven by both justice and personal loss, Claudio stole land from her family. Sofía isn’t afraid to challenge powerful people, and Batalla plays her as calm but relentless.

Every actor in Unspeakable Sins delivers performances that make their characters believable, flawed, and fully human.

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