Are we alone in the universe? The History Hunter examines an unexplained disappearance to find out. In 1978, a young pilot vanished during a routine flight over a notorious stretch of water known as the 'Bass Strait Triangle'. His radio transmission to airport control is one of the most bizarre ever recorded. What did Frederick Valentich encounter? Where did he disappear to? Can the truth be found? Join the History Hunter to explore this extraordinary story.