Overview

• All eight episodes are now streaming, with availability just after midnight PST in the western US, 3 a.m. EST on the US east coast, and 8 a.m. BST in the UK.
• The thriller follows ultra-wealthy families confined to a luxury underground shelter during a global crisis, where long-standing rivalries intensify.
• Produced largely at Netflix’s Tres Cantos complex near Madrid, the series was built on expansive physical sets and advanced in-studio production tech, with most scenes shot indoors.
• Netflix is positioning the show as a Spanish superproduction as it expands its hub in Spain, which has seen nearly 1,000 projects since 2017 and a pledged investment exceeding €1 billion through 2029.
• An early review from What’s on Netflix praises the scale and design while questioning the character focus, describing the series as stylish yet uneven.