Director Steve James, the filmmaker behind the revered basketball documentary Hoop Dreams, returns to the topic of sports with Head Games, a look at how the study of concussions and brain injuries has had a profound effect on professional and amateur athletes. Among the experts interviewed are hockey player Keith Primeau, American Olympian Cindy Parlow Cone, and award-winning sports broadcaster Bob Costas. Based on the nonfiction book by Chris Nowinski. ~ Perry Seibert, Rovi