In 1978, a young pilot named Frederick Valentich disappeared somewhere off the coast of Australia. His last recorded message to authorities -- "it's not an aircraft" -- prompted decades of speculation from UFOlogists, skeptics, and law enforcement alike. As we record tonight, his body has yet to be found.

The Legacy Program, Chapter Two: How Aliens (Could) Work
58:31

CLASSIC: Plastics, Microplastics and Conspiracy
51:37

The Legacy Program, Chapter One: Fact and Fiction
1:20:34