With the Vietnam War intensifying, America is more divided than ever. Country music is not immune to the divisions. Kris Kristofferson abandons his military career, becomes a writer whose lyricism sets a new standard for country songs.

Central European immigrants brought polka music to America in the mid-19th century but the people in the O'odham Indian nations in Arizona's Sonoran desert have made the mixture of accordions, saxophones and percussion all their own...Taken from the word baila, which means dance in Spanish, Akimel and Tohono people have created waila, a form of music that embodies polka and Mexican tejano, cumbias and Norteno. And one family, the famous Joaquin Brothers,...

Trace the histories of these three guests. Tina Fey’s fifth great-grandfather survived a terrible massacre and became a hero in the Greek War of Independence. David Sedaris’ ancestors were also touched by the Greek War of Independence. George Stephanopoulos’ family was willing to sacrifice themselves in the struggle against the Nazi occupation of Greece during World War II.

Ken Burns's two-part, four-hour documentary explores the revolutionary life of one of the 18th century's most complex and consequential figures, whose work and words unlocked the mystery of electricity and helped create the United States.

This season travels the universe across an expanse of tens of thousands of years to the present day as we investigate the possibilities and probabilities of life beyond Earth. We look at the unexplainable, enormous man-made caves, structures, crop circles containing encrypted messages, and complex mathematical and astronomical equations perplexing our leading scientists. Experts have found thousands of strange drawings of beings with blue skin, multi-limbed...