Missed that one.
I tried to find a summary because it's hard to believe in 1970 that people thought there might be civilizations on Mars and Venus. (I think that was your point.)
I couldn't find the summary but I found this link which if you don't have already- you might want to bookmark.
BTW Angie Dickenson was the female lead and it was produced by Arron Spelling- The Love Boat, Fantasy Island, Charlies Angels, Dynasty, and on and on......
