Hobbled by defective eyesight because of its original, bungled prescription, the Hubble Space Telescope was recently repaired in a dramatic Space Shuttle mission. NOVA follows the exploits of astronauts who saved the day, and the stunning work that Hubble has performed in the months since its repair.

NOVA explores the common threads that link the more than 5,000 languages of Earth, including a controversial theory that claims to reconstruct words from a time when only a handful of languages were spoken, recalling the biblical story of the Tower of Babel.