Review of Down to Earth

I remember it, too! I used to watch this show after school on SuperStation WTBS along with "Safe At Home" and "Rocky Road". I remember it pretty much as you described except that Dick Sargent was the second actor to play Richard Preston (just like he was the second Darrin on Bewitched -- did he ever originate a role?) I don't remember who was first except that he wore glasses. As I remember it, the part you didn't remember from the theme song was "Back down to earth To teach the Prestons, lessons -- Richard, Lyssy, Duane, and J.J., too! Now she must be a nineteen-eighties, lady....." I don't remember the rest either, but I really liked the show!