On October 20, 1967, Roger Patterson captured 60 seconds of film showing a creature walking through the Northern California woods—footage that became the most analyzed and debated in history. Fifty-seven years later, a reel of 16mm film discovered in a safe changes everything, revealing the untold story behind the world's greatest mystery, told for the first time by Patterson's own son and the people who were there.

Clint Patterson
as Self

Bob Heironimus
as Self

Bob Gimlin
as Self

Vaile Thompson
as Self

Bill Munns
as Self

Jeffrey Meldrum
as Self

Teresa Brooks
as Self

Sandy Collier
as Self

Larry Lund
as Self