On the night of August 12, 1967, grizzly bears in Glacier National Park killed two young women and severely mauled one man. For everyone involved, it remains an unforgettable night of crisis, intense fear, bravery and, ultimately, grief. This dramatic and tragic story, and how it eventually influenced the fate of the grizzly bear in the continental United States, takes center stage in the historical documentary, GLACIER PARK'S NIGHT OF THE GRIZZLIES. Archival material, photographs, re-creations and gripping on-camera interviews with survivors, witnesses, family members journalists and biologists, provide a complete account of those events. Veteran film and television actor J.K. Simmons (Law and Order, Juno, Up in the Air, The Closer) narrates.