Series synopsis
Day One is a Spanish drama mystery television series that premiered on Prime Video on March 13, 2026. It ended on March 13, 2026. It stars Álex González, Asier Etxeandia, Alba Planas and Jordi Mollà.
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.
Premise
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.
Premise: The future is offline. Your survival starts now.
Cast and characters
Leading cast
- Álex González as Ulises Albet
- Asier Etxeandia as Samuel Barrera
- Alba Planas as Rebeca
- Jordi Mollà as Diskin
- Renata Notni
- Ivan Massagué
- Mireia Oriol
- Melina Matthews
Supporting cast
- Peter Vives
- Àgata Roca
- David Selvas
- Mercè Martínez as Bet
- Frederico Barata as Joao
- David Janer as Oriol
- Zoe Gatell as Anna
- Arnau Gol-Karsunke as Rafa
- Lluís Altés as Jefe Científica
- Tana González as Jefe de Seguridad Diskin
- Víctor Benjumea as Recepcionista
- Annabel Castan as Abogada Rebeca
Guest cast
- Xavi Francés as Perdomo
- Christian Reyes as Agente de Seguridad Diskin
- Nuris Blu as Assistant
Episodes
This series spans 1 season with 6 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 6 | March 13, 2026 | March 13, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Episode 1 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. |
March 13, 2026 |
| 2 |
Episode 2 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. |
March 13, 2026 |
| 3 |
Episode 3 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. |
March 13, 2026 |
Production
Release
| Original network/platform | Prime Video |
|---|---|
| First aired | March 13, 2026 |
| Last aired | March 13, 2026 |
| Status | ended |