Day One: Story, Cast and Series Facts

Story and premise

Day One follows the story of Ulises Albet, a computer prodigy who left Barcelona and the world of technology after the death of his younger sister. Ten years later, a mysterious call from his former partner and best friend, Samuel Barrera, forces him to return during the Mobile World Congress. Samuel warns him that the world is in danger, leading Ulises to confront his past, technological advances, and the fundamental question: how far can we go without losing what makes us human?

Series details

• Title: Day One
• Format: Scripted
• Language: Spanish
• Genres: Action, Thriller
• Premiere date: 2026-03-13
• Status in TVmaze: To Be Determined
• Web channel listed by TVmaze: Prime Video
• Typical episode runtime: 43 minutes
• TVmaze community rating: 3.2/10
• TVMaze ID: 90771
• IMDb ID: tt35996744
• TVDB ID: 475359

Cast and credited roles

• Álex González — Ulises Albet
• Alba Planas — Rebeca
• Asier Etxeandia — Samuel Barrera
• Iván Massagué — Salvador
• Renata Notni — TBA
• Mireia Oriol — TBA
• Jordi Mollà — Damián

Seasons in the TVmaze catalogue

• Season 1: premiered 2026-03-13; final listed air date 2026-03-13; episode order: 6.

Source and licence

Adapted from Day One on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.