Masters of Sex's Groovy Season 4 Trailer Ushers in the Swinging '70s

After its polarizing third season, Masters of Sex looks poised not just to get its groove on in Season 4 but to get its groove back.

Yeah, sure, Bill appears to be in dire straits early on in the trailer Showtime released Tuesday. However, there are also some (hot, half-naked) hints that the sexual revolution and swinging ’70s will be good for the series as well as the doctor and partner Virginia.

If nothing else, it’s gotta be a good sign that even former hooker Betty looks scandalized in the key art below:

The drama returns Sunday, Sept. 11, at 10/9c with a roster of guest stars that includes Niecy Nash (Getting On) and David Walton (About a Boy).

Press PLAY on the trailer above, then hit the comments: Are you looking forward to Season 4 or thinking, “Not this season, honey, I have a headache?”