Masters of Sex

While trying to try to strike it out on their own, Masters is caught drunk-driving and Johnson works with Hugh Hefner while trying to get her story published.

Masters and Johnson turn to new partners in an effort to put the past behind them and focus on their expanding clinic. Meanwhile, Libby reevaluates her relationships.

Masters and Johnson adjust to their new partners, but their respective cases have them second-guessing the instinct to remain separated.

When Johnson, Masters, Libby, Betty, Lester and Keller wind up together at a swingers party thrown by Art and Nancy, pairings and perspectives change throughout the night.

Masters is forced to make a difficult admission and considers reuniting with Libby, while Johnson goes to New York in an effort to salvage the book deal.

While Johnson tries to get her relationship with Bill back on track, he looks for satisfaction elsewhere. Meanwhile, Betty and Helen ready themselves for a new addition.

Masters intends to make Art his protege as he expands his research, while Johnson keeps Nancy at arm's length. Meanwhile, Betty decides to ask for help.

While Masters and Johnson go on the road and pose as a couple at a competing clinic, Art, Nancy and Langham take advantage of their absence.

Masters and Johnson must deal with the ramifications of their trip to Topeka, while Art and Nancy work on having a fresh start.

As the practice disintegrates, Masters and Johnson make an important choice about their future. Meanwhile, Libby follows her heart and Art takes a stand against Nancy.