Katy Wang

In "Jane Elliott Against the World," a rural Iowa schoolteacher becomes a national voice against racism after leading a controversial 1968 lesson in discrimination with her all-white third-grade class. Now nearly 90, she refuses to hold back amid today’s fights about race, history and power after a lifetime of speaking out.

Documentarian Amir Bar-Lev takes us behind the scenes of "The Last First: Winter K2," the race to grab the last great prize in mountaineering, K2 in winter, which left five dead. It exposed deep fault lines in alpinism today: pressures from commercialization, toxic effects of social media and long-brewing tensions between those who’ve been marginalized and those who’ve always basked in the sport’s glory.

Filmmaker David Greaves reflects on completing one of his father’s most ambitious and personal projects — more than a decade after his death. William Greaves believed the most important event he ever filmed was a single evening in 1972, when he gathered living luminaries of the Harlem Renaissance for an intimate party at Duke Ellington’s home and let the cameras roll. David Greaves served as a cameraman that night. Along with producer Liani Greaves, they discuss revisiting the footage and the making of the film "Once Upon A Time In Harlem."

Director Rory Kennedy's "Queen of Chess" chronicles a Hungarian girl's dreams of conquering international men’s chess. After a 15-year battle against world champion Garry Kasparov, Judit Polgár revolutionizes the sport’s patriarchal culture to become one of the greatest chess prodigies in history and the greatest woman chess player of all time.

Against the backdrop of sunbaked parking lots, deserted courthouses and empty suburban homes — the familiar spaces of true crime, stripped of all action and spectacle — a filmmaker describes his abandoned Zodiac Killer documentary and probes the inner workings of a genre at saturation point. "Zodiac Killer Project" director Charlie Shackleton talks about the challenges of making a true crime documentary.

Co-directors Andrew Jarecki and Charlotte Kaufman talk about "The Alabama Solution" in which incarcerated men defy the odds to expose a cover-up in one of America’s deadliest prison systems.

Lives intertwine around Green Lake as a girl learns to sail, a boy fights for first chair, two sisters operate a bed-and-breakfast and a fisherman seeks the catch of his life. Director Sierra Falconer shares the stories behind "Sunfish (& Other Stories on Green Lake)."

In "Khartoum," five stories from Sudan weave together in search of freedom through animated dreams, street revolutions and civil war from the metropolis of Khartoum to their escape in East Africa. Two of the film's directors, Ibrahim Snoopy Ahmad and Timeea Mohamed, talk about the making of the film and the stories they captured.