Álex González
Ulises Albet
Series
Watch Day One (2026) Online
Synopsis
“The future is offline. Your survival starts now.”
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
Season 1
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1. Episode 1Now viewing2026-03-1346mAfter 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.
2. Episode 22026-03-1343mWith 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.
3. Episode 32026-03-1345mUlises 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.
4. Episode 42026-03-1341mRebeca 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.
5. Episode 52026-03-1342mUlises 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.
6. Episode 62026-03-1342mUlises 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.
Cast
Top Billed Cast
Asier Etxeandia
Samuel Barrera
Alba Planas
Rebeca
Jordi Mollà
Diskin
Renata Notni
Ivan Massagué
Mireia Oriol
Melina Matthews
Peter Vives
Àgata Roca
David Selvas
Mercè Martínez
Bet
Frederico Barata
Joao
David Janer
Oriol
No photo Zoe Gatell
Anna
No photo Arnau Gol-Karsunke
Rafa
Lluís Altés
Jefe Científica
Tana González
Jefe de Seguridad Diskin
Víctor Benjumea
Recepcionista
No photo Annabel Castan
Abogada Rebeca
Availability
Where To Watch Legally
Amazon Prime Video
Amazon Prime Video with AdsStreaming availability data provided by JustWatch.
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FAQ
Frequently Asked Questions
Is Day One available to watch online?
Yes - see the "Where to watch legally" section on this page for streaming, rental and purchase options.
How many seasons does Day One have?
Day One has 1 season and 6 episodes.
When did Day One first air?
Day One first aired in 2026.
Is Day One still running?
Day One's status on TMDB is: Ended.
What genre is Day One?
Day One is classified as Drama, Mystery.