시즌 4

아트워크

#	이미지	제목	방영일
1		Viking Secrets	2017. 12. 27.
2		Vikings In America	2018. 1. 3.
3		Origins of Stonehenge	2018. 1. 10.
4		The Secret	2018. 1. 17.
5		Butch Cassidy's Lost Loot	2018. 1. 24.
6		Hunt For The Metal Library	2018. 1. 31.
7		Great Women of Ancient Egypt	2018. 2. 7.
8		Egypt's Lost Queens	2018. 2. 14.
9		Secrets of Brother XII	2018. 2. 28.