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Netflix Premieres El Refugio Atómico, a High-Concept Bunker Thriller From Álex Pina and Esther Martínez Lobato

The creators of La Casa de Papel stage a claustrophobic social thriller inside a lavish underground complex built on an expansive Madrid set.

Overview

  • The Spanish series debuted on September 19, 2025, on Netflix with an eight-episode season set in the fictional Kimera Underground Park.
  • The story follows multimillionaires who retreat underground as a global conflict looms, forcing two families with a shared wound to coexist under pressure in a sealed environment.
  • The ensemble includes Miren Ibarguren, Joaquín Furriel, Natalia Verbeke, Carlos Santos, Pau Simón, Alícia Falcó, Agustina Bisio and Álex Villazán.
  • Production built one of Vancouver Media’s largest sets, totaling over 7,200 m² with a 6,200 m² main stage, employing around 400 crew and 4,700 extras.
  • Kimera’s design features a retrofuturist look with blue uniforms for owners and orange for staff, and is described by Netflix as accommodating 100+ guests with up to ten years of autonomy and extensive amenities.