Re: "Plato's Stepchildren:" Kirk-Uhura Rape Scene?
The United States never got any UK shows with bare breasts showing (before cable anyway), though one time a Benny Hill episode slipped through.
I recall a Monty Python episode or two that showed breasts. That was through PBS wherein some got it broadcast over air and others via cable. That was late 1970s I think.
"Ay plegli ianectu flaggen, tupep like for stahn... " - Cloud William