<Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Original air date </Th> <Th> U.S. viewers ( millions ) </Th> </Tr> <Tr> <Th> 4.1 </Th> <Td> `` Viking Secrets '' </Td> <Td> December 27 , 2017 ( 2017 - 12 - 27 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates investigates how a group of Norse tribesman gained power in medieval Europe , travelling to Denmark and Iceland . </Td> </Tr> <Tr> <Th> 4.2 </Th> <Td> `` Vikings in America '' </Td> <Td> January 3 , 2018 ( 2018 - 01 - 03 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates follows the Vikings ' westward expansion from Iceland to Greenland and into North America . </Td> </Tr> <Tr> <Th> 4.3 </Th> <Td> `` Origins of Stonehenge '' </Td> <Td> January 10 , 2018 ( 2018 - 01 - 10 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates travels to Britain to explore the origins of Stonehenge . He views a selection of monuments . </Td> </Tr> <Tr> <Th> 4.4 </Th> <Td> `` The Secret '' </Td> <Td> January 17 , 2018 ( 2018 - 01 - 17 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates travels all over the US to attempt to find the treasures featured in The Secret , a cryptic book published in the 1980s . He meets with members of the book 's following , who each think they 're about to find one of the 10 remaining treasures . </Td> </Tr> <Tr> <Th> 4.5 </Th> <Td> `` Butch Cassidy 's Lost Loot '' </Td> <Td> January 24 , 2018 ( 2018 - 01 - 24 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates investigates Butch Cassidy 's missing money . He goes to Colorado , Utah , and Nevada . </Td> </Tr> <Tr> <Th> 4.6 </Th> <Td> `` Hunt For The Metal Library '' </Td> <Td> January 31 , 2018 ( 2018 - 01 - 31 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates goes to the jungles of Ecuador to explore a flooded cave looking for some metal plates . </Td> </Tr> <Tr> <Th> 4.7 </Th> <Td> `` Great Women of Ancient Egypt '' </Td> <Td> February 7 , 2018 ( 2018 - 02 - 07 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates goes to Eygpt to investigate Hatshepsut , Nefertiti , and Cleopatra . ( Part 1 of 2 ) . </Td> </Tr> <Tr> <Th> 4.8 </Th> <Td> `` Egypt 's Lost Queens '' </Td> <Td> February 14 , 2018 ( 2018 - 02 - 14 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Second part of above episode . </Td> </Tr> <Tr> <Th> 4.9 </Th> <Td> `` Global Game Show : Out of This World '' </Td> <Td> February 21 , 2018 ( 2018 - 02 - 21 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Game show on the theme of extraterrestrials </Td> </Tr> <Tr> <Th> 4.10 </Th> <Td> `` Secrets of Brother XII '' </Td> <Td> February 28 , 2018 ( 2018 - 02 - 28 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates attempts to uncover a treasure left behind by the Aquarian Foundation . </Td> </Tr> </Table>
<Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Original air date </Th> <Th> U.S. viewers ( millions ) </Th> </Tr> <Tr> <Th> 4.1 </Th> <Td> `` Viking Secrets '' </Td> <Td> December 27 , 2017 ( 2017 - 12 - 27 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates investigates how a group of Norse tribesman gained power in medieval Europe , travelling to Denmark and Iceland . </Td> </Tr> <Tr> <Th> 4.2 </Th> <Td> `` Vikings in America '' </Td> <Td> January 3 , 2018 ( 2018 - 01 - 03 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates follows the Vikings ' westward expansion from Iceland to Greenland and into North America . </Td> </Tr> <Tr> <Th> 4.3 </Th> <Td> `` Origins of Stonehenge '' </Td> <Td> January 10 , 2018 ( 2018 - 01 - 10 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates travels to Britain to explore the origins of Stonehenge . He views a selection of monuments . </Td> </Tr> <Tr> <Th> 4.4 </Th> <Td> `` The Secret '' </Td> <Td> January 17 , 2018 ( 2018 - 01 - 17 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates travels all over the US to attempt to find the treasures featured in The Secret , a cryptic book published in the 1980s . He meets with members of the book 's following , who each think they 're about to find one of the 10 remaining treasures . </Td> </Tr> <Tr> <Th> 4.5 </Th> <Td> `` Butch Cassidy 's Lost Loot '' </Td> <Td> January 24 , 2018 ( 2018 - 01 - 24 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates investigates Butch Cassidy 's missing money . He goes to Colorado , Utah , and Nevada . </Td> </Tr> <Tr> <Th> 4.6 </Th> <Td> `` Hunt For The Metal Library '' </Td> <Td> January 31 , 2018 ( 2018 - 01 - 31 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates goes to the jungles of Ecuador to explore a flooded cave looking for some metal plates . </Td> </Tr> <Tr> <Th> 4.7 </Th> <Td> `` Great Women of Ancient Egypt '' </Td> <Td> February 7 , 2018 ( 2018 - 02 - 07 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates goes to Eygpt to investigate Hatshepsut , Nefertiti , and Cleopatra . ( Part 1 of 2 ) . </Td> </Tr> <Tr> <Th> 4.8 </Th> <Td> `` Egypt 's Lost Queens '' </Td> <Td> February 14 , 2018 ( 2018 - 02 - 14 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Second part of above episode . </Td> </Tr> <Tr> <Th> 4.9 </Th> <Td> `` Global Game Show : Out of This World '' </Td> <Td> February 21 , 2018 ( 2018 - 02 - 21 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Game show on the theme of extraterrestrials </Td> </Tr> <Tr> <Th> 4.10 </Th> <Td> `` Secrets of Brother XII '' </Td> <Td> February 28 , 2018 ( 2018 - 02 - 28 ) </Td> <Td> N / A </Td> </Tr> <Tr> <Td colspan="4"> Gates attempts to uncover a treasure left behind by the Aquarian Foundation . </Td> </Tr> </Table>
expedition unknown season 4 episode 10 air date
expedition unknown season 4 episode 10 air date
February 28 , 2018
February 28 , 2018