When an old enemy, the Cylons, resurface and obliterate the 12 colonies, the crew of the aged Galactica protect a small civilian fleet - the last of humanity - as they journey toward the fabled 13th colony, Earth.

'Battlestar Galactica' is acclaimed for its intricate characters, realistic human struggles, and profound themes like survival and morality. The show's dark, gritty tone and focus on character-driven drama over special effects are highly praised. Its mature exploration of political, religious, and social issues, along with innovative cinematography, stands out. However, some critics note a decline in later seasons, with issues like plot coherence and melodrama. Despite this, it remains a significant sci-fi series.