Orbiting Earth at around 27.000 km/h, the International Space Station is one of humanity’s greatest engineering achievements, but also one of the most unforgiving places ever built. Astronauts and mission controllers recount moments when routine work suddenly became a fight for survival: a spacesuit filling with water, toxic ammonia spraying across a spacewalker, dangerous temperature extremes, radiation, fire, contamination and the constant threat of collision. The series reveals how every mission depends on training, improvisation and split-second decisions in an environment where even a small failure can become fatal.
Across the two episodes, presented here together in a single uninterrupted video, the danger escalates from the hazardous construction and maintenance of the station to the growing risks of life aboard it. Astronauts face micrometeoroids and space debris travelling at lethal speeds, docking emergencies and system failures, culminating in the extraordinary 2021 incident when the newly arrived Nauka module unexpectedly fired its thrusters and sent the entire ISS rotating out of control. With communications at risk and the structure under immense strain, crews in orbit and controllers on Earth must work together to regain control. The result is a gripping story of courage, science and survival inside a machine that has kept humans continuously living in space for more than two decades.