The Last Episode of Twilight Zone Season 5

"The Witchin' Pool" is a warning of what the 1960s was going to bequeath to our generation and the one before ours.  A upper class couple are suffering a marriage collapse.  The children  go through a Twilight Zone swimming pool bottom that leads to an idyllic Huckleberry Finn sort of community.  

It is all such a perfect metaphor of how divorcing parents put themselves first.  "The kids will do okay."

You can imagine how it ends.  The children go back to the paradise when Mom and Dad cannot stop fighting.  This was first broadcast in 1964.