The Invisible Guardian

Behind the Scenes of The Invisible Guardian: Spain’s Chilling Crime Trilogy Kicks Off

The Invisible Guardian (2017) isn’t just another police procedural—it’s the first installment of Fernando González Molina’s Baztan Trilogy, a Spanish crime saga that blends folklore, forensic detail, and a haunting Basque Country setting. Starring Marta Etura as Inspector Amaia Salazar, the film adapts Dolores Redondo’s bestselling novel, plunging viewers into a world where myth and murder collide. But what went into bringing this atmospheric thriller to life?

From Page to Screen: The Trilogy’s Origins

The Baztan Trilogy novels—The Invisible Guardian, The Legacy of the Bones, and Offering to the Storm—were already literary sensations in Spain before Molina signed on to direct. The first book’s adaptation faced high expectations, especially given its supernatural-tinged plot: a serial killer leaves victims posed like figures from Basque mythology, forcing Salazar to confront both a monster and her own traumatic past .

Molina, known for his work on romantic dramas like Three Steps Above Heaven , pivoted to darker material for this project. The shift wasn’t just tonal; it required meticulous research into forensic procedures and Basque culture to ground the story’s eerie folklore in realism. Interviews with the cast suggest Molina leaned heavily on Redondo’s input, ensuring the adaptation stayed true to the novel’s unsettling atmosphere .

Casting the Detective: Marta Etura’s Amaia Salazar

Marta Etura’s portrayal of Inspector Amaia Salazar is the film’s anchor. Etura, a veteran of Spanish cinema, brought a mix of vulnerability and steel to the role—a detective haunted by her childhood in the Baztan Valley, now returning to solve a case that mirrors her own nightmares. The actress reportedly immersed herself in police procedural details, shadowing real investigators to nail Salazar’s methodical yet emotionally raw approach .

Etura’s chemistry with co-stars like Elvira Mínguez (playing her aunt, Engrasi) and Francesc Orella (as her boss, Commissioner Markina) was crucial. Mínguez, in particular, stood out as the warm but sharp-tongued family matriarch, providing a counterbalance to Salazar’s brooding intensity. The supporting cast—including Patricia López Arnaiz as Salazar’s sister and Javier Botet as the hulking, silent villain—added layers to the film’s tension .

The Trilogy’s Production Challenges

Filming in the misty, rugged landscapes of Navarre’s Baztan Valley wasn’t easy. The region’s unpredictable weather—dense fog, sudden rain—added authenticity but also logistical headaches. Molina and his team had to work around the elements, often shooting in brief windows of clear light to capture the valley’s eerie beauty .

The trilogy’s production was also a financial gamble. While The Invisible Guardian performed well in Spain, its international appeal hinged on Netflix’s acquisition, which helped it reach a wider audience . The streaming giant’s involvement likely influenced the pacing and visual style, with Molina balancing the film’s literary roots and the need for cinematic suspense.

Reception and Legacy

Critics were divided. Some praised the film’s moody atmosphere and Etura’s performance, while others found the supernatural elements underdeveloped . The French review site SensCritique gave it a middling 6/10, calling it a "solid but uneven" adaptation . Still, the trilogy’s completion—with The Legacy of the Bones (2019) and Offering to the Storm (2020)—proved its staying power, even if later installments received mixed scores .

For fans of crime thrillers, The Invisible Guardian remains a standout for its blend of procedural grit and mythic dread. Its success paved the way for more Spanish genre films to cross over, though Molina himself hasn’t returned to the genre—his next project was the lighter Palm Trees and Power Lines (2023).