While the new Will Smith movie has received mixed reviews from critics, Peggy Mason, a professor of neurobiology at the University of Chicago, is more concerned with the science behind the story than whether it's an Oscar contender. She joins us to discuss her thoughts on the film and to shed light on the dangers associated with concussions.

FRONTLINE’s much-anticipated documentary, League of Denial: Inside the NFL’s Concussion Crisis, explores whether the NFL put players at risk by denying the relation between concussions and long-term health issues. Our panel tackles the question of football safety at all levels.