7.1/10360 votesLoading...#1 - Monkey Business
Season 3 Episode 7 - Aired 8/23/2015
Masters and Johnson are interviewed as they take on an exotic new patient.
Director: Adam Arkin
Writer: N/A
7.4/10345 votesLoading...#2 - High Anxiety
Season 3 Episode 9 - Aired 9/6/2015
Masters continues his surrogacy program, now under Johnson's critical eye.
Director: Daniel Attias
Writer: Jonathan Igla
7.6/10402 votesLoading...#3 - Three's a Crowd
Season 3 Episode 2 - Aired 7/19/2015
Masters takes on a high profile patient. Virginia and Libby come to terms.
Director: Dean Perisot
Writer: Amy Lippman
7.6/10389 votesLoading...#4 - The Excitement of Release
Season 3 Episode 3 - Aired 7/26/2015
Masters and Johnson look to capitalize on their burgeoning fame.
Director: Miguel Sapochnik
Writer: Steven Levenson
7.6/10357 votesLoading...#5 - Surrogates
Season 3 Episode 8 - Aired 8/30/2015
Johnson jets away with Dan Logan. Masters begins his surrogacy program.
Director: Matt Earl Beesley
Writer: N/A
7.6/10278 votesLoading...#6 - In To Me You See
Season 4 Episode 7 - Aired 10/23/2016
Masters looks to groom Art as his protege in a new area of research as Johnson does her best to keep Nancy at arm's length. Betty seeks an unlikely source for assistance in her fight for equal rights to Helen's baby.
Director: Michael Apted
Writer: N/A
7.7/10983 votesLoading...#7 - Race to Space
Season 1 Episode 2 - Aired 10/6/2013
On the heels of Masters’ proposal that they participate in the sexual response study, Johnson considers the best course of action to keep her job – only to find she no longer has one. The study has been forced out of the hospital and Masters believes Johnson is to blame. As Johnson fights to save her job and struggles to care for her kids, Masters moves his study to a brothel. But Masters soon discovers that the chaos of the cathouse is unmanageable without Johnson’s help.
Director: Michael Dinner
Writer: Michelle Ashford
7.7/10474 votesLoading...#8 - Mirror, Mirror
Season 2 Episode 8 - Aired 8/31/2014
Masters privately treats a couple for infertility, without revealing his relationship to them. Johnson realizes her work with Masters can be used to help people suffering from sexual dysfunction - but quickly gets in over her head when she attempts to treat Barbara Sanderson on her own. Libby is unnerved after witnessing a hate crime that is then whitewashed by the police.
Director: Michael Apted
Writer: Steven Levenson
7.7/10371 votesLoading...#9 - Undue Influence
Season 3 Episode 4 - Aired 8/2/2015
Masters seeks unexpected advice. Virginia is distracted by news of Henry.
Director: Christopher Manley
Writer: Gina Fattore
7.7/10336 votesLoading...#10 - Freefall
Season 4 Episode 1 - Aired 9/11/2016
In the wake of their fallout, Masters and Johnson search for purpose in a world without one another and look to work as their personal lives crash down around them. Libby finds herself alone for the first time since her marriage and discovers some unexpected allies. Season premiere.
Director: Colin Bucksey
Writer: N/A
7.7/10307 votesLoading...#11 - Inventory
Season 4 Episode 2 - Aired 9/18/2016
Masters and Johnson turn to new partners in an effort to put the past behind them and focus on their expanding clinic. Given their fractured triangle, Libby reevaluates her relationship with Bill and Virginia.
Director: Jeremy Webb
Writer: N/A
7.7/10295 votesLoading...#12 - The Pleasure Protocol
Season 4 Episode 3 - Aired 9/25/2016
Masters and Johnson adjust to new partners, but their respective cases have them second-guessing the instinct to remain separated. A romantic prospect pushes Libby to embrace life as a newly single woman of the sexual revolution.
Director: Adam Arkin
Writer: N/A
7.8/10653 votesLoading...#13 - Parallax
Season 2 Episode 1 - Aired 7/13/2014
Masters deals with the ramifications of his disastrous presentation and being fired from the hospital. Meanwhile, Libby urges Masters to get another job; and Virginia fights off advances and innuendos stemming from the belief that she was the woman in Master's explicit film.
Director: Michael Apted
Writer: Michelle Ashford
7.8/10550 votesLoading...#14 - Kyrie Eleison
Season 2 Episode 2 - Aired 7/20/2014
Masters begins a new job at Memorial Hospital under Betty's extortion terms only to discover that his boss insists he leave Virginia behind in favor of a handpicked secretary. Meanwhile, Johnson is torn between pressing Masters to rehire her and staying by DePaul's side as her condition worsens.
Director: Michael Apted
Writer: David Flebotte
7.8/10361 votesLoading...#15 - Two Scents
Season 3 Episode 6 - Aired 8/16/2015
Masters and Johnson take on a famous couple hoping to renew their sex life.
Director: Michael Weaver
Writer: N/A
7.8/10352 votesLoading...#16 - Through a Glass, Darkly
Season 3 Episode 10 - Aired 9/13/2015
Johnson objects to Masters' program following missteps in the protocol.
Director: Jeremy Webb
Writer: N/A
7.9/10904 votesLoading...#17 - Standard Deviation
Season 1 Episode 3 - Aired 10/13/2013
Masters and Johnson continue their research in the brothel but skewed data confirms that Masters must get the study back into the hospital. At the hospital, Johnson is surprised to learn that a distinguished new doctor on the OB/GYN floor is a woman who has no interest in female solidarity. Meanwhile, Libby struggles to conceive and Dr. Ethan Haas gets the case of a lifetime – a woman pregnant with quadruplets.
Director: Lawrence Trilling
Writer: Sam Shaw
7.9/10529 votesLoading...#18 - Dirty Jobs
Season 2 Episode 4 - Aired 8/3/2014
Langham observes Masters and Johnson exiting a hotel room and shares his suspicions with DePaul, who is forced to make plans for her work without Virginia's involvement. Meanwhile, Betty attempts to conceal her infertility from Gene; and Masters tries to bring Johnson aboard as his assistant only to be thwarted by the head of the hospital, who takes a prurient interest in Masters' study.
Director: Michael Engler
Writer: Steven Levenson
7.9/10502 votesLoading...#19 - Asterion
Season 2 Episode 7 - Aired 8/24/2014
In the wake of Masters' discovery that Johnson has continued to have romantic relationships with other men, he becomes impotent without her knowledge and cuts off their sexual work together. He tries to keep his new clinic solvent over the course of three years by borrowing against his house, offering medical services to the hotel - and finally accepting money from his mother.
Director: Michael Dinner
Writer: David Flebotte, Michelle Ashford
7.9/10451 votesLoading...#20 - Story of My Life
Season 2 Episode 9 - Aired 9/7/2014
Virginia continues to impersonate a patient's case history in order to glean advice from a psychiatrist. Betty and Masters' attempt to remedy Lester's impotence by hiring a prostitute rattles him even further. Libby gets the third degree when she offers her eyewitness testimony regarding the beaten man. And Barbara Sanders wrestles with an unsettling diagnosis that exposes a chain of secrets and causes Masters and Johnson to clash over their treatment strategy.
Director: Jeremy Webb
Writer: Amy Lippman
7.9/10446 votesLoading...#21 - Parliament of Owls
Season 3 Episode 1 - Aired 7/12/2015
Masters and Johnson face the press for the first time.
Director: Jeremy Webb
Writer: Michelle Ashford
7.9/10284 votesLoading...#22 - Night and Day
Season 4 Episode 9 - Aired 11/6/2016
Masters and Johnson return from Topeka, each grappling with the trip's ramifications. Art and Nancy look to tie up loose ends in order to have a fresh start, and Libby embarks on a road trip with Bram that changes her perspective.
Director: Karyn Kusama
Writer: N/A
8.0/101,331 votesLoading...#23 - Pilot
Season 1 Episode 1 - Aired 9/29/2013
Dr. William Masters, Washington University’s foremost OB/GYN, runs a successful medical practice by day and conducts a secret study of human sexuality by night. Former nightclub singer Virginia Johnson joins the hospital secretarial staff and proves herself to be an asset to Masters’ work.
Director: John Madden
Writer: Michelle Ashford
8.0/10862 votesLoading...#24 - Thank You for Coming
Season 1 Episode 4 - Aired 10/20/2013
With the study back in the hospital, Masters and Johnson recruit new participants on campus. But Johnson is shocked when her ex-husband George, who’s crashing on her couch, wants to sign up. Masters’ mother comes to visit, but her new take on life stirs up painful memories of his childhood. And Libby’s attempt at playing matchmaker with Virginia and Ethan doesn’t go as smoothly as she’d hoped.
Director: Jennifer Getzinger
Writer: Amy Lippman
8.0/10766 votesLoading...#25 - Love And Marriage
Season 1 Episode 8 - Aired 11/17/2013
Masters and Johnson decide that the best way to record their study findings is to film them, but to do so they have to enlist outside help. Johnson redoubles her efforts to get a college degree, only to find that Dr. DePaul’s Basic Anatomy class is a requirement. Meanwhile, Haas and Langham – both unsure in their relationships – convince each other of the merits of being a married man. And after Margaret catches him in a compromising position, Scully takes drastic steps to control his sexual impulses.
Director: Michael Apted
Writer: Tyler Bensinger, Michael Cunningham
The Worst Episodes of Masters of Sex
Every episode of Masters of Sex ranked from worst to best. Explore the Worst Episodes of Masters of Sex!
William Masters and Virginia Johnson are real-life pioneers of the science of human sexuality. Their research touched off the sexual revolution and took them from...
Genre:Drama
Network:Showtime
Worst Episodes Summary
"Monkey Business" is the worst rated episode of "Masters of Sex". It scored 7.1/10 based on 360 votes. Directed by Adam Arkin and written by N/A, it aired on 8/23/2015. This episode scored 0.3 points lower than the second lowest rated, "High Anxiety".