Bob Mugge Showscases Gil Scott-Heron in "Black Wax."

Robert Mugge makes documentary films about unique and vital American music. His subjects include Al Green, Sonny Rollins, and native Hawaiian musicians. PBS will broadcast six of his movies this summer.

Ben Stiller on hsi new documentary "Stiller and Meara: Nothing Is Lost". The film is about his parents, comedy duo Jerry Stiller and Anne Meara.

HBO premieres a documentary film called "My Mom Jayne." It marks the directorial debut of "Law & Order: SVU" star Mariska Hargitay, who sets out in the film to learn about her mother, who died in a car accident when Mariska was 3. Her mother was Jayne Mansfield, the famous movie star of the 1950s and '60s. Our TV critic David Bianculli says that "My Mom Jayne" turns out to be much more intimate and full of genuine surprises than he expected.