On a steamy afternoon in August 1963, a 34-year-old minister gave a speech that enthralled a crowd of more than 200,000 gathered at Washington's Lincoln Memorial, and millions more across the country who watched on television. With passion and precision, he proclaimed his vision of a nation free of racism, declaring, "Now is the time to make justice a reality for all of God's children."

What came to be known as the I Have a Dream speech was a high point in the public career of Martin Luther King Jr. But it was also a turning point in his personal life, as he embarked on a controversial, often lonely, struggle to redefine and redirect the movement he had helped lead. The quest would not end until his untimely death five years later.

Sunday, 1/15 from 11:30 p.m. - 1:30 a.m. ET