Season 20 aired between 10 May 2006 and 03 Jan 2007, 9 episodes.
Episodes
E01
John Ford/John Wayne: The Filmmaker and the Legend
10 May 2006
E02
The World of Nat King Cole
17 May 2006
E03
Woodie Guthrie: Ain't Got No Home
12 Jul 2006
E04
Marilyn Monroe: Still Life
19 Jul 2006
E05
Walter Cronkite: Witness to History
26 Jul 2006
E06
Andy Warhol: A Documentary (Part 1)
20 Sep 2006
E07
Andy Warhol: A Documentary (Part 2)
21 Sep 2006
E08
Sketches of Frank Gehry
27 Sep 2006
E09
Annie Leibovitz: Life Through a Lens
03 Jan 2007