Sezon 20
Bölümler
1 Oswald's Ghost 14 Oca 2008 
2 The Lobotomist 21 Oca 2008 
3 Eyes on the Prize (7 & 8): The Time Has Come/Two Societies 3 Şub 2008 
4 Grand Central 4 Şub 2008 
5 Eyes on the Prize (9 & 10): Power!/The Promised Land 10 Şub 2008 
6 Eyes on the Prize (11 & 12): Ain't Gonna' Shuffle No More/A Nation of Law? 17 Şub 2008 
7 Eyes on the Prize (13 & 14): The Keys to the Kingdom/Back to the Movement 24 Şub 2008 
8 Kit Carson 18 Şub 2008 
9 Buffalo Bill 25 Şub 2008 
10 Minik: The Lost Eskimo 31 Mar 2009 
11 Walt Whitman 14 Nis 2008 
12 Roberto Clemente 21 Nis 2008 
13 George H.W. Bush (1) 5 May 2008 
14 George H.W. Bush (2) 6 May 2008