Sezon 29
Bölümler
1 Search for a Safe Cigarette 2 Eki 2001 
2 18 Ways to Make a Baby 9 Eki 2001 
3 Secrets of the Mind 23 Eki 2001 
4 Sex: Unknown 30 Eki 2001 
5 Russia's Nuclear Warriors 6 Kas 2001 
6 Bioterror 13 Kas 2001 
7 Life's Greatest Miracle 20 Kas 2001 
8 Methuselah Tree 11 Ara 2001 
9 Flying Casanovas 25 Ara 2001 
10 Death Star 8 Oca 2002 
11 Neanderthals on Trial 22 Oca 2002 12 Fireworks 29 Oca 2002 
13 Secrets, Lies, and Atomic Spies 5 Şub 2002 
14 The Missing Link 26 Şub 2002 
15 Shackleton's Voyage of Endurance 26 Mar 2002 
16 Why the Towers Fell 30 Nis 2002 
17 Fire Wars 7 May 2002