Right Click to download the transcript.

On August 16th, 1942 the US Navy airship the L-8 set off on a routine mission in the early hours of the morning. When the ship returned to the California coast nearly 5 hours later the crew had mysteriously disappeared. No one knows what ever happened to them.

Some of Our Research:
Unsolved.com
Greatest Unsolved mysteries
Navy blimp fact
Check Six