League of Denial: The NFL's Concussion Crisis

Video type: Full Episode

The National Football League presides over America's indisputable national pastime, but the league is under assault: Thousands of former players have claimed it tried to cover up how football inflicted their long-term brain injuries. What did the NFL know, and when did it know it? In a special two-hour investigation, FRONTLINE reveals the hidden story of the NFL and brain injuries.

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Watch full episodes of Reagan,, Doctor Blake Mysteries, Father Brown, Death in Paradise, New Tricks, and Moone Boy online.

Cancer - The Emperor of All Maladies