I barely remember this show. It wasn't on very long and was the last of the type of TV shows that Irwin Allen produced at 20th Century-Fox Television, starting with "Voyage to the Bottom of the Sea." I don't know why Allen did this show, but it seems from the result that his heart wasn't it it anymore. Maybe it was because concept shows like this had just become to expensive to make. One thing I do remember well was that although the music was credited to Richard La Salle, much of it was lifted from Jerry Goldsmith's score to the original "Planet of the Apes" movie. Allen's "Lost in Space" TV show did the same thing with its music, much of it actually coming from Bernard Herrmann's scores to "The Day the Earth Stood Still" and "Journey to the Center of the Earth." Since all these shows and movies were produced at Fox I guess they could do these things in those days.