The Last Unknown: Season 1 - 4 Episode s
1x1 - The Aleutian Islands
March 18, 2021
Ian Shive leads a risky expedition into a remote Alaskan wildlife refuge.
1x2 - Palmyra Atoll
March 18, 2021
Ian explores one of Earth's most well-protected coral reef ecosystems.
1x3 - Rose Atoll
March 18, 2021
Ian joins a team of scientists to unlock vital new info about coral reefs.
1x4 - The Channel Islands
March 18, 2021
Ian explores one of America's least-known national parks.