Zero Day ending explained: cyber attack and Proteus decoded

Robert De Niro faces a modern threat in Netflix's political thriller.
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Netflix

Zero Day spoilers ahead.

Netflix has a new six-part thriller and we cannot get enough. Zero Day stars Robert De Niro (Taxi Driver, The Irishman) as George Mullen: a former US president turned special commission investigator.

In the gripping series, we see Mullen face a complex but all-too-realistic cyberattack, which plunges the world into chaos. Mullen leads an investigation that uncovers a web of conspiracy involving powerful figures and technological manipulation, while also dealing with his own mental decline.

Zero Day explores the fragility of modern society, the dangers of unchecked power, and the ethical dilemmas faced in a world increasingly reliant on technology (“Right now, our actual world is scarier,” De Niro told Netflix.) The ending of the series is pretty complicated and definitely leaves room for interpretation. Here's an explanation of the Zero Day ending.

What is going on in Zero Day?

The limited series explores systemic corruption, revealing how a cyberattack could serve as a catalyst for a calculated power grab. Former President Mullen (played by De Niro), a figure grappling with his own cognitive decline, navigates a labyrinth of lies, exposing the government, technology, and corporate interests that are all interconnected.

The narrative in Zero Day blurs the line between victim and perpetrator, forcing viewers to confront the uncomfortable reality that in an age of information warfare, the fabric of society can be weaponised, and the pursuit of truth becomes a morally ambiguous challenge.

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Netflix

Who is behind the cyber attack in Zero Day?

The cyberattack in Zero Day is revealed to be orchestrated by a network of influential people, including tech moguls, political figures, and even members of Mullen's own inner circle - most notably his daughter Alexandra (gasp!).

The people behind the attack aimed to exploit the vulnerabilities of the digital age to grab power and reshape the political landscape, using the chaos of the "Zero Day" event as a cover for their plans. At the end of the series, we find out that the attack wasn't the work of just one person, but instead was a calculated move by a group aiming to manipulate the system from within.

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What happens to Roger in Zero Day?

In the Netflix series Zero Day, Roger Carlson (played by Jesse Plemons) is a key figure in the tech world and a close associate of De Niro's George Mullen. Roger gets caught up in the conspiracy, and is eventually revealed to be involved in both the development and deployment of the technology that fuels the attack.

Ultimately, Roger's fate is unresolved; while his involvement is exposed and we find out that his motivations are not completely malicious, the series focuses more on the broader political implications and Mullen's actions.

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Jojo Whilden/Netflix