Season 25 aired between 08 Jan 2013 and 12 Nov 2013, 8 episodes.
Episodes
E01
The Abolitionists: 1820s-1838
08 Jan 2013
E02
The Abolitionists: 1838-1854
15 Jan 2013
E03
The Abolitionists: 1854-Emancipation and Victory
22 Jan 2013
E04
Henry Ford
29 Jan 2013
E05
Silicon Valley
05 Feb 2013
E06
War of the Worlds
29 Oct 2013
E07
JFK: Part 1
11 Nov 2013
E08
JFK: Part 2
12 Nov 2013