The Blackout Invasion Earth S01e01 -

The first episode, often titled "Last Day," establishes the catastrophic premise of the series:

The search results indicate that is primarily known as a 2019 Russian sci-fi film (titled Avanpost or Outpost in Russia). While often marketed and streamed as a standalone movie, it was originally conceived and released as a television series. Episode 1 Summary: "Last Day" The Blackout Invasion Earth s01e01