Season 9
11 Episodes -
S9-E1 What on Earth? - Season 9 Episode 1
S9-E2 What on Earth? - Season 9 Episode 2
S9-E3 What on Earth? - Season 9 Episode 3
S9-E4 What on Earth? - Season 9 Episode 4
S9-E5 What on Earth? - Season 9 Episode 5
S9-E6 What on Earth? - Season 9 Episode 6 - Lost City of the Vampires
S9-E7 What on Earth? - Season 9 Episode 7 - Temple Of The Island Eater
S9-E8 What on Earth? - Season 9 Episode 8 Horror Of Dead Man's Island
S9-E9 What on Earth? - Season 9 Episode 9 - Stalin's Secret Atlantis
S9-E10 What on Earth? - Season 9 Episode 10 - America's Secret Apocalypse
S9-E11 What on Earth? - Season 9 Episode 11 Lair of the Living God
Season 10
11 Episodes -
S10-E1 What on Earth? - Season 10 Episode 1 - Australia's Nuclear Desert
S10-E2 What on Earth? - Season 10Episode 2 - Dark Mysteries of Halloween
S10-E3 What on Earth? - Season 10 Episode 3 - Viking Warrior Invasion
S10-E4 What on Earth? - Season 10 Episode 4 - Mystery of Apache Mountain
S10-E5 What on Earth? - Season 10 Episode 5 - Hidden Fortress of Secrets
S10-E6 What on Earth? - Season 10 Episode 6 - Code of the Viking Witch
S10-E7 What on Earth? - Season 10 Episode 7 - Mystery of the Cursed Forest
S10-E8 What on Earth? - Season 10 Episode 8 - Secrets of the Roman Occult
S10-E9 What on Earth? - Season 10 Episode 9 - Legend of Moonshine Forest
S10-E10 What on Earth? - Season 10 Episode 10 - Nuclear Ghost Towns
S10-E11 What on Earth? - Season 10 Episode 11 - Lair of the Living God
Season 11
10 Episodes -
S11-E1 What on Earth? - Season 11 Episode 1 - Secret Soviet Spacecraft
S11-E2 What on Earth? - Season 11 Episode 2 - Range of Nazi Evil
S11-E3 What on Earth? - Season 11 Episode 3 - Doomsday Lair of Greece
S11-E4 What on Earth? - Season 11 Episode 4 - Mystery of the Welsh Mine
S11-E5 What on Earth? - Season 11 Episode 5 - Riddle of Sardinia Tower
S11-E6 What on Earth? - Season 11 Episode 6 - Circles of the High Kings
S11-E7 What on Earth? - Season 11 Episode 7 - Russia's Lightning Lab
S11-E8 What on Earth? - Season 11 Episode 8 - Poland's Secret Nazi Compound
S11-E9 What on Earth? - Season 11 Episode 9 - Holes of Dead Sea Destruction
S11-E10 What on Earth? - Season 11 Episode 10 - Ancient Rome's El Dorado
Season 12
08 Episodes -
S12-E1 What on Earth? - Season 12 Episode 1 Bullseye in the Sky
S12-E2 What on Earth? - Season 12 Episode 2 Mystery of the Fallen Star
S12-E3 What on Earth? - Season 12 Episode 3 Indiana's War Factory
S12-E4 What on Earth? - Season 12 Episode 4 Turkey's Lost Terror Dome
S12-E5 What on Earth? - Season 12 Episode 5 Blood Feud of Gresham Castle
S12-E6 What on Earth? - Season 12 Episode 6 The Boneyard of Arizona
S12-E7 What on Earth? - Season 12 Episode 7 Nevada's Mystery Marking
S12-E8 What on Earth? - Season 12 Episode 8 Ghost Ship of Ireland