The new Spanish thriller on Prime Video, Agent Zeta, attempts to blend international conspiracy, buried secrets from the past, and a high-stakes battle between intelligence agencies. While the film boasts impressive production value and a strong cast, its narrative leans too heavily on familiar genre conventions and lengthy exposition, which ultimately slows the story’s momentum.
Directed by Dani de la Torre, the film follows intelligence agent Zeta, played by Mario Casas, who is called in to investigate the simultaneous murders of four former Spanish intelligence officers scattered across the globe. The link between them lies in their involvement in a decades-old covert mission in Colombia known as Operation Swamp (Operación Ciénaga). With a fifth member — Salvador Ancares (Luís Zahera) — of the operation still alive and now missing, Zeta is tasked with finding the survivor before the case escalates into an international crisis.
The story unfolds through Zeta’s attempt to piece together what really happened during the secret operation. As he revisits old files and reconnects with former contacts, the investigation reveals gaps in official records and suggests that parts of the mission were deliberately concealed.
The problem is that much of this reconstruction unfolds through flashbacks and lengthy explanations, reducing the sense of discovery that usually drives a compelling espionage thriller. Instead of watching clues gradually unfold through investigation, viewers are often handed information directly, which weakens the impact of the film’s potential twists.
One of the film’s most intriguing elements is the presence of agent Alfa, played by Mariela Garriga. Assigned by the Colombian government to run her own investigation, she enters the race with a clear objective: reach the surviving operative before Zeta — and prevent the Spanish agent from uncovering connections that could expose sensitive secrets between the two countries.
Their rivalry adds tension to the narrative and reinforces the story’s international scope. Alfa often appears to be one step ahead, forcing Zeta to react quickly and constantly adapt his strategy in order to keep the mission under control. Despite the dramatic potential of this dynamic, the screenplay never fully explores the chemistry between the two characters.
And if the script follows a predictable path, the film’s production clearly aims higher. Shot across several countries, the movie relies on real locations, chase sequences, and action scenes that help broaden the scale of the story. The cinematography and moody atmosphere reinforce the tone of a spy thriller, while the performances — particularly from Mario Casas and Luis Zahera — anchor the film’s more dramatic moments.
Casas portrays Zeta as an introspective agent weighed down by the past and the pressure of his mission. Zahera, meanwhile, brings intensity to every scene he appears in, elevating the tension at key points in the narrative.
In the end, Agent Zeta delivers a competent entry in the espionage genre, supported by polished production and an experienced cast. However, its reliance on well-worn spy movie tropes and heavy exposition limits the film’s overall impact. The story touches on compelling themes such as state secrets, loyalty, and political manipulation, but rarely explores them deeply enough to truly stand out among other thrillers in the genre.
For viewers who enjoy stories about espionage and international conspiracies, the film may still offer an entertaining watch. Yet considering the talent behind the project, it ultimately feels like Agent Zeta had the potential to be far more gripping than what appears on screen.
