As known so far, every DVD and VHS release worldwide only contains the much shorter Original Version. However the German TV-Version features a lot of footage which is not included in the worldwide DVD releases. It is very likely that the extended TV Version has been shown in other countries too. In the Original Version scenes were cut or shortened that add to the plot or deepen it. For example, in the TV version we learn what happens to Gene Randall, or we find out, why Neil Chase is visitting Colonel Hanley. The scene with the NASA people is left out entirely. A detailed comparison between both versions with pictures can be found here.