In this 30-minute interview, Oprah Winfrey sits down with director Ava DuVernay to discuss her Oscar-nominated film, historical cycles of oppression and the broken prison system.

The surprising and entertaining life of renowned film critic and social commentator Roger Ebert (1942-2013): his early days as a freewheeling bachelor and Pulitzer Prize winner, his famously contentious partnership with Gene Siskel, his life-altering marriage, and his brave and transcendent battle with cancer.