NOVA ‘Forgotten Genius’

Airs on Wednesday, Jan. 27 at 8 p.m.

Being the grandson of Alabama slaves, Percy Julian encountered every possible barrier in a deeply segregated America. He was a man of genius, devotion and determination. Being a black man made him an outsider, and he fought to make a place for himself in a country divided by bigotry. Eventually, however, he would find freedom in the laboratory.

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John Denver: Country Boy

A documentary that explores the private life and public legacy of acclaimed singer and songwriter, John Denver.

'Downton Abbey' returns to Arizona PBS

Downton Abbey season 1 cast

Return to the beginning of the phenomenon Feb. 27 (streaming) and March 7 (on air). After the Titanic goes down, the Crawley family and their household meet the new heir. All the drama, romance, scheming and triumph lie ahead.

Ken Burns presents 'Hemingway'

Ken Burns and Lynn Novick explore the life and work of the legendary writer and his enduring influence on literature and culture.