1 - 1Race for the Railroad Oct. 10, 2021
1 - 2Liberty Rising Oct. 17, 2021
1 - 3Road Warriors Oct. 24, 2021
1 - 4The Panama Canal Oct. 31, 2021
1 - 5Race to the Underground Nov. 07, 2021
1 - 6Cable Across the Sea Nov. 14, 2021
1 - 7Battle of the Bridges Nov. 21, 2021
1 - 8The Hoover Dam Nov. 21, 2021