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Day One
On Prime Video — From Zebra Producciones · NewCo Audiovisual
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Where to watch
Not available to stream in US
🔔 Notify me about new seasonsSynopsis
Barcelona, 2026. During Mobile World Congress week, Ulises Albet, a former tech prodigy turned anti-tech activist, becomes the prime suspect in a murder. As he escapes through a city under lockdown, he uncovers the imminent launch of a groundbreaking technology that could put humanity's ethical future at risk. To stop it, he must confront his past.
Episodes
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- E1 Episode 1Next upMar 13, 2026 · 46 min
Synopsis
After years in isolation, Ulises returns to Barcelona when his former partner asks for help decrypting Pandora, the code behind a revolutionary technology. The reunion ends in murder, turning Ulises into the main suspect. As a video of his escape goes viral, tech mogul Damián Diskin prepares to launch Day One, and Ulises realizes that nothing - not even his friend's death - is what it seems.
Guest stars: Xavi Francés (Perdomo), Christian Reyes (Agente de Seguridad Diskin), Nuris Blu (Assistant)
- E2 Episode 2Mar 13, 2026 · 43 min
Synopsis
With no trace of Pandora, Ulises turns to Paula, who shows him another video revealing the killer. The only person who can clear him is Rebeca, whose social media activity puts her in Diskin's sights. Determined to protect the launch of Day One, Diskin intervenes through the technology itself, erasing evidence and sending a mercenary to silence all witnesses.
Guest stars: Xavi Francés (Perdomo), Christian Reyes (Agente de Seguridad Diskin)
- E3 Episode 3Mar 13, 2026 · 45 min
Synopsis
Ulises goes into hiding with Rebeca, the only witness who can prove his innocence. Together they discover where Pandora may be hidden, but Rebeca secretly activates the technology, exposing their location. Diskin sends his mercenary to close all loose ends. As violence erupts, Ulises loses everything and is forced to run once again.
Guest stars: Xavi Francés (Perdomo)
- E4 Episode 4Mar 13, 2026 · 41 min
Synopsis
Rebeca is questioned by the police while Ulises becomes the prime suspect in another murder. When they reunite, they finally access Pandora and uncover its true nature. Unaware that she is being controlled through the contact lenses, Rebeca exposes their location. Biran heads toward their location, as both the police and Diskin close in.
- E5 Episode 5Mar 13, 2026 · 42 min
Synopsis
Ulises and Rebeca go to the Synchrotron. They need the power of the accelerator to obtain definitive proof that could stop 'Day One'. When they activate the contact lenses to infiltrate the facility, Diskin tracks them. A chase erupts inside the accelerator. Separated and cornered, Ulises escapes outside, where he comes face to face with Inspector Moreno, who aims... and fires.
Guest stars: Xavi Francés (Perdomo), Christian Reyes (Agente de Seguridad Diskin)
- E6 Episode 6Mar 13, 2026 · 42 min
Synopsis
Ulises and Rebeca are taken to Diskin's headquarters under the threat of Inspector Moreno. Meanwhile, Beth considers betraying the magnate and seeks Salvador's help. Diskin reveals the true purpose of the lenses and asks Ulises for his collaboration. As the global launch begins, evidence of the technology's danger breaks into the live broadcast, exposing the truth.
Guest stars: Xavi Francés (Perdomo), Christian Reyes (Agente de Seguridad Diskin), Nuris Blu (Assistant)
Cast & crew
Álex González
Asier Etxeandia
Alba Planas
Jordi Mollà
Renata Notni
Ivan Massagué
Mireia Oriol
Melina Matthews
Peter Vives
Àgata Roca
David Selvas
Mercè MartínezVideos
Trailers
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Reviews · from TMDB members
MovieGuysMar 22, 2026
"Day One" does a few things moderately well but remains a rather formulaic sci-fi crime thriller. If you were expecting anything novel or thought-provoking, you won't find much on offer from this Spanish series. It's a very mild cautionary tale about the risks associated with AI and big tech, but this is, at its core, a crime thriller. Predictably there's the usual woke content and a warning about how social media needs policing, even, no doubt, if that means taking aw… Read more
ay people's right to privacy, as we are seeing in Australia. Acting in this series is solid; no complaints there, and it's well paced and rarely dull. In summary, a serviceable sci-fi thriller from Spain. Worth a look.