From the planets to the stars and out to the edge of the unknown, history and science collide in a wondrous yet deadly adventure through space and time.
Seasons
Specials
4 episodes
Dec 3, 2005
Season 1: Our Solar System
14 episodes
May 29, 2007
Season 2
18 episodes
Nov 27, 2007
Season 3
12 episodes
Nov 11, 2008
Season 4
12 episodes
Aug 18, 2009
Season 5
8 episodes
Jul 29, 2010
Season 6
7 episodes
Oct 25, 2011
Season 7
7 episodes
Apr 29, 2012
Season 8
4 episodes
Mar 1, 2014
Season 9
6 episodes
Apr 18, 2015
