Carl Sagan's 1994 book "Pale Blue Dot" supplies the text and the title for this second installment of an unauthorized documentary series built around it. The film returns to the photograph that gives the book its name, the image of Earth as a single pixel taken by Voyager 1 from nearly four billion miles away, and uses it as the anchor for a meditation on human scale and cosmic perspective. Archival space footage, mission imagery, and narration drawn from Sagan's own writing carry the argument that everything humanity has ever fought over or celebrated happened on that one speck of light. Where the first installment in the series laid out the wonder of the cosmos, this entry turns toward the theme named in its subtitle, humility, tracing what it means to see ourselves from that distance. It is a quiet, image-driven film built more on ideas than on new footage or interviews.