The BEST episodes of What on Earth? season 6

Every episode of What on Earth? season 6, ranked from best to worst by thousands of votes from fans of the show. The best episodes of What on Earth? season 6!

Eyes in the sky. Watching us from space. Hundreds of satellites showing us the world like we've never seen it before. Capturing images which are breathtaking but bizarre. Objects and phenomena which defy explanation. Baffling phenomena seen from space, what on Earth are they?

Last Updated: 12/13/2024Network: Science ChannelStatus: Continuing
World's Deadliest Threats
star
7.86
42 votes

#1 - World's Deadliest Threats

Season 6 - Episode 1 - Aired 6/6/2019

The world's most dangerous threats are in top-secret locations all over the planet, and using cutting-edge technology, experts reveal the truth behind these sinister mysteries from space.

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North Korea Death Star
star
7.83
40 votes

#2 - North Korea Death Star

Season 6 - Episode 3 - Aired 6/20/2019

When satellites spot a mysterious structure in North Korea, experts investigate if this sinister evidence points to a looming nuclear threat, and using cutting-edge tech, they reveal dark secrets from this strange place.

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Monsters of Diamond Desert
star
7.50
42 votes

#3 - Monsters of Diamond Desert

Season 6 - Episode 2 - Aired 6/13/2019

An abandoned ghost town in a remote desert with a dark past. When a strange facility is spotted in Russia, experts investigate if it's hiding evidence of alien life. Cutting-edge tech reveals new clues to these sinister mysteries from space.

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The King at Roswell
star
7.41
44 votes

#4 - The King at Roswell

Season 6 - Episode 8 - Aired 8/1/2019

When a strange, red plane is discovered near the sight of the Roswell UFO incident, experts wonder if the aircraft has Nazi or extraterrestrial origins, and their investigation reveals new secrets about one of America's most famous faces.

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Terror of the Ice Snake
star
7.33
36 votes

#5 - Terror of the Ice Snake

Season 6 - Episode 6 - Aired 7/18/2019

In the white ice of Antarctica, satellites discover a mysterious trail of sinister black objects, and when experts discover that it's moving, they use cutting-edge tech to investigate who or what is behind this strange phenomena.

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Treasures of Monster Graveyard
star
7.33
40 votes

#6 - Treasures of Monster Graveyard

Season 6 - Episode 9 - Aired 8/8/2019

At a mysterious site in the Gobi Desert, experts have discovered a monster graveyard, and this groundbreaking find contains the treasures of the alien beasts that once lived in this strange world.

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Curse of Genghis Khan
star
7.22
41 votes

#7 - Curse of Genghis Khan

Season 6 - Episode 7 - Aired 7/25/2019

When an strange structure is discovered in the Gobi Desert, experts investigate if this mysterious site could reveal the whereabouts of lost treasure, which might change everything we know about Genghis Khan and the Mongol warriors who once lived here.

Watch Now:Apple TV
The Cave to Hell
star
7.22
37 votes

#8 - The Cave to Hell

Season 6 - Episode 5 - Aired 7/11/2019

When a sinister cave is discovered in a remote corner of Iceland, experts uncover a secret underworld tunneling to unknown depths, and using cutting-edge tech, they investigate if this strange place could hold secrets of alien worlds.

Watch Now:Apple TV
Aliens of the Infinity War
star
7.16
45 votes

#9 - Aliens of the Infinity War

Season 6 - Episode 4 - Aired 6/27/2019

When a strange pattern appears in a field, experts wonder if its an extraterrestrial response to a message sent to an alien star cluster in 1974, and using cutting-edge science, they uncover its true origin.

Watch Now:Apple TV