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What is Day One about?

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.

Latest episode

S1 · Episode 6 — Episode 6 · 2026-03-13

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.

Genres: Drama, Mystery
First aired: 2026-03-13
Rating: ★ 6.5 / 10

Top cast

Álex González Ulises Albet
Asier Etxeandia Samuel Barrera
Alba Planas Rebeca
Jordi Mollà Diskin
Renata Notni
Ivan Massagué

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