Trivial Tuesday

Since nobody got it last week, I am going to keep it going this week.  I think it partially got buried under the rest of my posts.  So, I am going to give the question, with the clue, all over again.
What is considered to be the first “Reality Television” program in the United States? Clue #1:  This program aired during the early to mid-1970s.
I will add more clues if they're needed.  No, it's not Survivor.  Have a good evening.