Season 4
Episodes
1 America's Highways Sep 2, 1996 
2 The Telephone Sep 15, 1996 
3 Aqueducts Oct 6, 1996 
4 Television Oct 20, 1996 
5 The Computer Nov 24, 1996 
6 Captured Light Dec 15, 1996 
7 Stealth Technology Feb 16, 1997 
8 Pyramids: Majesty And Mystery Mar 23, 1997 
9 Roller Coasters Apr 13, 1997 
10 Observatories: Stonehenge to Space Telescopes Jun 8, 1997 
11 The Great Wall of China. Jun 22, 1997 12 Air Force One: A History Jan 1, 1997
2 The Telephone Sep 15, 1996 3 Aqueducts Oct 6, 1996 4 Television Oct 20, 1996 5 The Computer Nov 24, 1996 6 Captured Light Dec 15, 1996 7 Stealth Technology Feb 16, 1997 8 Pyramids: Majesty And Mystery Mar 23, 1997 9 Roller Coasters Apr 13, 1997 10 Observatories: Stonehenge to Space Telescopes Jun 8, 1997 11 The Great Wall of China. Jun 22, 1997 12 Air Force One: A History Jan 1, 1997