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