NRL great James Graham takes us inside one of the most brutal concussions he suffered on the field. Graham also interviews former Roosters captain Boyd Cordner, who retired at age 29 because of concussion. Boyd opens up on his toughest moments in his final seasons in his most revealing interview on the issue yet and explains how the paralysing headaches caused by concussions affected his day-to-day life. James also reveals the results of his brain test with Dr Alan Pearce.