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| Will Smith | Dr. Bennet Omalu | |
| Bitsie Tulloch | Keana Strzelczyk | |
| Gugu Mbatha-Raw | Prema Mutiso | |
| Alec Baldwin | Dr. Julian Bailes | |
| Matthew Willig | Justin Strzelczyk | |
| Luke Wilson | Roger Goodell | |
| Stephen Moyer | Dr. Ron Hamilton | |
| Adewale Akinnuoye-Agbaje | Dave Duerson | |
| Paul Reiser | Dr. Elliot Pellman | |
| David Morse | Mike Webster | |
| Eddie Marsan | Dr. Steven DeKosky | |
| Albert Brooks | Dr. Cyril Wecht | |
| Richard T. Jones | Andre Waters | |
| Hill Harper | Christopher Jones | |
| Mike O'Malley | Daniel Sullivan | 
| Director | 
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| Producer | Ridley Scott | 
|  | A look at how American football players suffer from major head injuries and life-long debilitating problems as a result of repeated concussions and efforts by the National Football League to deny it. | 
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