Browse episode ratings trends for The Last Unknown. Simply click on the interactive rating graph to explore the best and worst of The Last Unknown's 4 episodes.
Best Episodes of The Last Unknown
Palmyra Atoll
S1 Ep2
8.0
18th Mar 2021
Ian explores one of Earth's most well-protected coral reef ecosystems.
Worst Episodes of The Last Unknown
Rose Atoll
S1 Ep3
7.5
18th Mar 2021
Ian joins a team of scientists to unlock vital new info about coral reefs.
The Last Unknown Episode Guide
The Aleutian Islands
S1 Ep1
8.0
18th Mar 2021
Ian Shive leads a risky expedition into a remote Alaskan wildlife refuge.
Palmyra Atoll
S1 Ep2
8.0
18th Mar 2021
Ian explores one of Earth's most well-protected coral reef ecosystems.
Rose Atoll
S1 Ep3
7.5
18th Mar 2021
Ian joins a team of scientists to unlock vital new info about coral reefs.
The Channel Islands
S1 Ep4
7.5
18th Mar 2021
Ian explores one of America's least-known national parks.
Loading...
The best rated episodes of The Last Unknown are:
Palmyra Atoll S1E2 rated 8.0
The lowest rated episodes of The Last Unknown are:
Rose Atoll S1E3 rated 7.5
The first episode of The Last Unknown aired on March 18, 2021.
The last episode of The Last Unknown aired on March 18, 2021.
