L'odyssée interstellaire

I saw both documentaries,"Search For Second Earth" & "The Living Universe", and i don't know what to say, both are very good for "Space exploration & finding new worlds in universe fans",including me,but, a many CGI stuff and picturtes are the same in both docu's,i'm not saying that are not good,but i'm wondering is one documentary(The Living Universe) merged together with some changes and updates and extras and second(Search for second earth) is divided into a episodes,so one is to be shown as one complete film in some countries and another as episodes in some other countries, depending of different rights or i dunno what?!?!