Nancy Nall's take:
“Masters of Sex,” which started strong, has stagnated into the same half-dozen or so themes over and over — Sex is science, sex is emotion, sex follows a script, sex never follows a script, blah blah blah. Will Dr. Masters overcome his emotional repression? Will Virginia Johnson get the respect she craves? We interrupt this repetition to display Lizzy Caplan’s naked breasts again. We interrupt those breasts to show you the saucy blonde secretary’s breasts again. And so on.
Also, I’m tired of these allegedly period shows dumping 21st-century language and attitudes hither and yon when it suits the writers. The previews for next week show one character raging, “I’m just an organ donor to you people,” a neat trick for 1959 or thereabouts, when organ transplantation was in its very earliest days and the phrase “organ donor” was hardly in common usage.