HEAR YE ! HEAR YE !
Watch the series, very informative, although some redundant information you might have heard over and over again , the above link is one of the series about Time Travel , they have 3 seasons , they're all scattered on youtube ,
Imho excellent series, as good as THE UNIVERSE which is by far the most complete and informative series about the universe , oh and the Blue Ray Rips are all over the internet , but the total size is more than 200gb to download , the whole series is on youtube though
enjoy