In this genre-bending tale, Errol Morris explores the mysterious death of a U.S. scientist entangled in a secret Cold War program known as MK-Ultra.

1. Chapter 1: Suicide Revealed 42m In 1953, Army scientist Frank Olson takes a fatal plunge from a hotel window. In 1975, a bombshell report ties his death to a top-secret experiment.

2. Chapter 2: A Terrible Mistake 48m Amid a wave of media attention, the government races to placate the family. In New York, Frank visits a doctor known for his unconventional methods.

3. Chapter 3: The Forbidden Threshold 41m One trip to New York morphs into two when Frank suffers a setback on the way home. Decades later, an apprehensive Eric checks into room 1018A.

4. Chapter 4: Opening the Lid 47m A hotel worker overhears a curious phone call the night of Frank's death. In 1994, a forensics expert exhumes the body to find compelling new clues.

5. Chapter 5: Honorable Men 42m Frank's growing concerns about Cold War activities raise alarm bells at the CIA. A frustrated Eric launches a last-ditch bid for closure.