: Catherine Durand detects an intelligent signal from space. Arrival : Metallic spheres land in major cities worldwide.

: How quickly society collapses without electricity.

The premiere introduces Catherine Durand, an astrophysicist working at the Institut de Radioastronomie Millimétrique in the French Alps. Her discovery of a high-frequency signal coming from the direction of Ross 128—a signal that is clearly not a natural phenomenon—serves as the catalyst for the series. The episode handles this discovery with a sense of mounting dread rather than triumph. Durand’s immediate concern is not just the signal itself, but the sheer power and intent behind it, signaling that humanity is no longer alone.