Patriots Day, directed by Peter Berg, tells the story of the events leading up to the horrific terrorist attack at the Boston Marathon in 2013 and its aftermath. Mark Wahlberg stars as Sgt. Tommy Saunders and John Goodman plays Police Commissioner Ed Davis, who led the unprecedented manhunt for the two brothers behind the attack. Thousands of officers searched a 20-block area of town in the hunt, which left one brother dead and the other injured and arrested. 

In this exclusive video, see how filmmakers re-created race day, actually filming the marathon as it happened in 2016 and re-creating a finish-line set and Boylston Street down to the smallest details.

Patriots Day opens in theaters December 21.