My sisters and I used to watch this show. I think it was on PBS. I think the theme music was one of Holst's "The Planets" but I'm not sure. The show was about a boy and a girl who would communicate by a video relay that somehow went through time itself so they were separated by 100 years. One of them lived on a space station, and the other on earth. I can't even remember which one lived where, though I think the girl lived in space. (Most girls do.) Can anyone help me identify this show?