Tower of Babel
Episode: 4x01 | Airdate: Apr 24, 2017
Episodes
Riddle of Petra
Episode: 4x02 | Airdate: May 1, 2017
Stonehenge: The Final Mystery
Episode: 4x03 | Airdate: May 8, 2017
The Headless Gladiators of York
Episode: 4x04 | Airdate: May 15, 2017
The Ten Plagues of Egypt
Episode: 4x05 | Airdate: May 22, 2017
Shrunken Heads
Episode: 4x06 | Airdate: May 29, 2017
Bog Bodies
Episode: 4x07 | Airdate: Jun 5, 2017
Garden of Eden
Episode: 4x08 | Airdate: Jun 12, 2017