In the ongoing debate about mental health, parents of children with serious mental disorders are often left out of the mix, according to filmmaker Liz Garbus in this Peabody Conversation. Her documentary “A Dangerous Son,” follows three boys with serious behavioral issues and their parents, who must manage unpredictable, often violent behaviors with few resources. The HBO film was honored for its relentlessly honest look at the struggles these parents face, and for urging change in the mental health system.