Looks like the swinging 70's are here in this teaser for the new season of Showtime's Masters of Sex. Or maybe it's the late 60's. Either way, I don't see much Bill and Virginia action in this, which is the driving force of the show, so I hope this separation doesn't last too long. As the show moves into the 1970's, I think we're getting close to the time that Masters and Johnson got married, so it's got to be coming soon. Season 4 premieres on Sunday, September 11th.