The Eternaut Release Date, Storyline, and Everything You Need To Know

The Eternaut Release Date, Storyline, and Everything You Need To Know

A ruthless snowstorm falls on Buenos Aires, along with an alien invasion that will challenge humanity’s will to survive. Netflix’s adaptation of the iconic comic will reshape Latin American science fiction. Netflix is gearing up for the release of one of its biggest-ever Latin American projects on April 30, 2025.

“The Eternaut” (El Eternauta), based on the iconic Argentine comic by Héctor Germán Oesterheld and Francisco Solano López, is the long-gestating passion project on which it was once thought the Argentine director would never land, finally coming to screens after decades of failed attempts at adaptation.

The Eternaut Release Date

The Eternaut will be available to audiences worldwide on Netflix from April 30, 2025. The release arrives after a lengthy production process that started in earnest in February 2020 when Netflix co-founder Reed Hastings announced the streaming giant would create the series.

The film was significantly delayed due to the COVID-19 pandemic, with the release being pushed from 2021 to 2022 and then to the current 2025 date. Principal photography started in Buenos Aires in May 2023 and ended in December that year, with post-production work continuing until 2024.

The April release date establishes The Eternaut as a significant international play for Netflix in the first half of 2025, and the streaming service is giving the series an ambitious international publicity push as what Netflix Vice President for Latin American Content Francisco Ramos has called “one of the most ambitious Latin American projects in Spanish ever produced.”

The Origins of The Eternaut

The Eternaut first appeared as a comic book series published from 1957 to 1959 and is considered one of the most influential works of Latin American science fiction. The plot centers on Juan Salvo and a collection of survivors who fight against the alien invasion, which starts with a killer snowfall above Buenos Aires.

It’s been a long and winding road toward adaptation. As early as 1968, an animation company licensed rights for a television series, and a 24-minute pilot was produced but never picked up. Over the ensuing decades, a range of directors, including Fernando Solanas, Gustavo Mosquera, and Adolfo Aristarain, expressed interest in adapting the tale but would be thwarted by financial and copyright complications.

More recently, director Lucrecia Martel spent a year and a half writing a script, but the Oesterheld family believed it deviated too much from the source material. The Spanish filmmaker Álex de la Iglesia also expressed interest in 2018, and while he attached the actor Ricardo Darín to star, it was a relationship that would later reap fruit.

The Eternaut Plot And Premise

Netflix describes the premise: “One summer’s night in Buenos Aires, a mysterious deadly snowfall kills most of the population and leaves thousands stranded. Juan Salvo and his friends are diving into a deadly struggle for survival. Everything is upturned when they learn that the toxic snowstorm is just the first strike from a foreign army invading Earth. The only way to make it all together and die fighting. No one will make it on their own.”

The series focuses on everyday people plucked from their sphere of the world into extraordinary circumstances, with a heavy emphasis on collective action being the only chance to survive. Solidarity is a theme crucial to Oesterheld’s original vision, in which he eschewed the notion of a single hero in favor of what he called a “collective hero.”

Star-Studded Cast

Actor	Character	Description
Ricardo Darín	Juan Salvo	Central character; reluctant leader during the alien invasion
Carla Peterson	Elena	Juan’s wife; emotional and moral support throughout the crisis
César Troncoso	—	Key supporting survivor character
Andrea Pietra	—	Member of the core survivor group
Ariel Staltari	—	Member of the core survivor group
Marcelo Subiotto	—	Member of the core survivor group
Mora Fisz	—	Additional survivor or supporting role
Claudio Martínez Bel	—	Additional survivor or supporting role
Orianna Cárdenas	—	Additional survivor or supporting role

Managing The Production Process: From Comic Book To Screen

The current adaptation took shape in 2018 when director Bruno Stagnaro met with producers Matías Mosteirín and Leticia Cristi of K&S Films. Stagnaro had tried to make the comic into a film as early as 2003, even writing a script for the first episode and holding tests with actor Rodrigo de la Serna, but concerns over the budget made the project fall apart.

The Oesterheld family, which retains rights to the original work, imposed two basic requirements for any adaptation: It must take place in Buenos Aires and be spoken in Spanish. These requirements fit nicely with Stagnaro’s desire to retain the story’s distinctly Argentine nature.

In February 2020, Netflix co-founder Reed Hastings announced that the streaming giant would make the series, with Stagnaro directing and the author’s grandson, Martín Oesterheld, as a consultant. However, COVID-19 delayed production, and the planned release was moved from 2021-2022 to 2025.

Information About Filming

Principal photography took place in Buenos Aires starting in May 2023, with Gastón Girod as director of photography. The production used over 35 physical locations around the city, augmented by more than 25 stages built with virtual production techniques.

María Battaglia and Julián Romera, the art directors, ascribed the realistic presentation of snow in a city that does not often see it to “high mountain documentaries, Norwegian painters and different Buenos Aires photographers.” The team used the original comic as their “bible,” referring to it often for artistic and aesthetic direction. One of the production’s most technically ambitious elements was mapping out large chunks of Buenos Aires digitally and importing them into an Unreal Engine virtual-reality system.

“These places can only be designed by the people who live there; you can’t copy-paste the assets from abroad; only Argentines would know to design places that look like Oesterheld’s Buenos Aires,” Stagnaro stressed. Its filming ended in December 2023, and post-production lasted until 2024. The series, featuring a musical score by Federico Jusid, will comprise six episodes.

The Eternaut Episode List

Episode	Title	Description
1	TBA	Mysterious snowfall begins; mass deaths shock Buenos Aires
2	TBA	Survivors form a group; Juan emerges as a reluctant leader
3	TBA	Flashbacks reveal hints about the alien invaders’ purpose
4	TBA	Tensions rise within the group; moral dilemmas intensify
5	TBA	Human enemies surface; trust is broken
6	TBA	Final battle for survival; some resolution and a potential setup for more

Where To Watch The Eternaut

The Eternaut will join Netflix worldwide on April 30, 2025. As one of Netflix’s most critical global productions for 2025, the streaming service has significantly invested in internationalizing this Argentine classic. The show will be available in its original Spanish with subtitles in several languages. Netflix subscribers can binge-watch all six episodes at once or take in the sci-fi thriller at a more measured pace.

Frequently Asked Questions

Q. What is The Eternaut about?
A. The Eternaut follows an invasion of Buenos Aires, in which a deadly snowfall in the city marks the first assault. It is up to Juan Salvo and a band of survivors to unite to battle these foreign invaders to save humanity!

Q. What’s the release date for The Eternaut?
A. The six-episode series will debut on Netflix on April 30, 2025.

Q. Is The Eternaut adapted from a book?
A. The show is based on the Argentine comic book El Eternauta, which was published between 1957 and 1959. It was written by Héctor Germán Oesterheld and illustrated by Francisco Solano López.

Q. Why is The Eternaut important in Latin American culture?
A. The original comic is regarded as one of the greatest Latin American works of science fiction and has had a huge cultural impact in Argentina. Its tonviolent resistance against invasion themes have frequently been read as political allegory, and the work has shaped generations of creators.

Final Words

With April 30 less than a month away, excitement is building over this momentous adaptation. For audiences in Argentina, The Eternaut means more than simply an exciting new series in the science fiction genre; it’s the resurrection of a dearly beloved cultural touchstone.

For international viewers, it provides a glimpse of a uniquely Latin American vision of apocalypse and resistance, finally realized after decades of false starts and near misses. With its blend of local specificity and universality, Netflix’s The Eternaut seems primed to carve out its corner in the increasingly crowded world of global science-fiction television.