
Masters of Sex: Season 1
2013 · 12 episodes · ★ 7.4
What Season 1 of Masters of Sex
Masters of Sex begins in 1956 at Washington University in St. Louis. Dr. William Masters, a fertility specialist, runs a clinic by day and, at night, secretly prepares a study on human sexuality. Knowing that Dean Barton Scully will not look kindly on the project, he turns to Virginia Johnson, a former nightclub singer who works as a secretary at the hospital and soon proves indispensable. When the research is forced out of the hospital, Johnson struggles to keep her job and custody of her children. Masters moves the study to a brothel. The series portrays both this groundbreaking research and the personal and professional relationship that binds the two together.
Season 1 Episodes

1x01 Pilot
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.
Directing: John Madden · Writing: Michelle Ashford · Starring: Annaleigh Ashford, Roslyn Ruff, Margo Martindale, Steve Rosen

1x02 Race to Space
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.
Directing: Michael Dinner · Writing: Michelle Ashford · Starring: Annaleigh Ashford, Elizabeth Dennehy, April Parker Jones, Ruby Lewis

1x03 Standard Deviation
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.
Directing: Lawrence Trilling · Writing: Sam Shaw · Starring: Annaleigh Ashford, Mae Whitman, Lauren Weedman, Nicholle Tom

1x04 Thank You for Coming
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.
Directing: Jennifer Getzinger · Writing: Amy Lippman · Starring: Michael Mantell, Martha Hackett, Emily Bridges, Dean Chekvala

1x05 Catherine
When Masters and Johnson expand the study to include couples, they discover that the science of sex is easily complicated by the mystery of attraction. Johnson tries to connect with her son who prefers his dad. In anticipation of his baby’s impending arrival, Masters experiences anxiety about becoming a father. And Dr. Ethan Haas learns that dating the provost’s daughter could impact his medical career.
Directing: Michael Apted · Writing: Michelle Ashford, Sam Shaw · Starring: Joseph Lyle Taylor, Kyle Jones, Emily Davenport, Romina Bovolini

1x06 Brave New World
In the aftermath of the miscarriage, Libby and Masters travel to Miami for some much needed rest and relaxation, but Masters is drawn back into his work by a sexually adventurous couple next door. Alone in the hospital, Virginia enlists Jane in an effort to debunk Freud’s theory that one kind of female orgasm is better than another. And Langham finds an unlikely cure for his sexual dysfunction in Margaret Scully.
Directing: Adam Davidson · Writing: Lyn Greene, Richard Levine · Starring: Barry Bostwick, Ann Cusack, Caroline Lagerfelt, Leah Costello

1x07 All Together Now
Masters and Johnson continue their sexual response study – now as participants – but Johnson fears their work may be interfering with Masters’ home life. Libby pressures Dr. Haas to resume her fertility treatments in secret. Meanwhile, Haas struggles to let go of feelings for Virginia as his relationship with Vivian deepens. And Margaret Scully, caught in her infidelity, confronts her husband on the mounting problems in their marriage.
Directing: Tim Fywell · Writing: Tyler Bensinger · Starring: Alan Ruck, John Pollono, Brian R. Norris, Shanna Collins

1x08 Love And Marriage
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.
Directing: Michael Apted · Writing: Michael Cunningham, Tyler Bensinger · Starring: Kevin Christy, Finn Wittrock, Flex Alexander, Brit Shaw

1x09 Involuntary
When Masters and Johnson decide to film external reactions in the study, they must convince Lester and Jane that their footage won’t cross the line into pornography. Haas and Vivian’s plans for a Presbyterian church wedding are sidetracked when Haas reveals he’s Jewish. Libby keeps her pregnancy a secret from Masters and instead encourages him to mend his relationship with his mother. But during late night visits to the hospital, Estabrooks observes Masters and Johnson’s intimate relationship.
Directing: Jennifer Getzinger · Writing: Noelle Valdivia · Starring: Kevin Christy, Doug McKeon, Rob Kerkovich, Bennet Guillory

1x10 Fallout
The hospital takes part in a nationwide civil defense drill, and the heightened atmosphere escalates conflicts among the staff. A former study participant reveals she’s pregnant and wants to know the identity of the father. Masters and Johnson, their relationship strained after ending their study participation, butt heads on whether to maintain study confidentiality or take responsibility. Haas learns he’s been denied a future job at the hospital but wrongly assumes his breakup with Vivian is to blame. Margaret Scully seeks answers about her husband’s sexuality from an unlikely source.
Directing: Lesli Linka Glatter · Writing: Sam Shaw · Starring: Kevin Christy, Spencer Garrett, Anne Dudek, Joan Severance

1x11 Phallic Victories
With Johnson no longer on his team, Masters accepts Libby’s offer to help compile the study work for a hospital-wide presentation. But when Masters sees another doctor’s presentation put his colleagues to sleep, he becomes determined to grab their attention even if it means pushing through provoking, but incomplete, research. Dr. DePaul and Johnson travel to a medical convention and DePaul opens up on why her work on the Pap smear is so important. And Virginia’s ex-husband George returns to find Ethan Haas playing father to his children.
Directing: Phil Abraham · Writing: Amy Lippman · Starring: Michael Cassidy, Amanda Jane Cooper, Rebecca Staab, Rebecca Larsen

1x12 Manhigh Season Finale
Masters’ work on human sexuality culminates with a hospital-wide presentation of his and Johnson’s research findings. But when Masters attempts to push the envelope with the external footage of the female orgasm, the doctors’ response to the film is not what he had hoped. Meanwhile, Haas entertains a job offer at UCLA Hospital and considers what a move would mean for his relationship with Virginia. Scully pursues electroshock treatment with the hope of curing his homosexuality but Margaret has second thoughts about the risks involved.
Directing: Michael Dinner · Writing: Michelle Ashford · Starring: Kevin Christy, Jason Kravits, James Eckhouse, Robert Joy
Season 1 Cast
Michael SheenWilliam Masters12 episodes
Caitlin FitzGeraldLibby Masters12 episodes
Nicholas D'AgostoEthan Haas12 episodes
Heléne YorkeJane Martin10 episodes
Cole SandHenry Johnson6 episodes
Kevin ChristyLester Linden4 episodes
Finn WittrockDale4 episodes
Garrett M. BrownChancellor Fitzhugh3 episodes
Ellen WroeGinger2 episodes
William NicolOperating Doctor #22 episodes
Alan RuckPsychiatrist2 episodes
Logan DonovanTravis Banks2 episodesAll Seasons
Where to Watch Season 1 of Masters of Sex
It is currently not available on the major streaming platforms.
Frequently Asked Questions
How many episodes are in Masters of Sex season 1?
Season 1 of Masters of Sex has 12 episodes.
When did season 1 of Masters of Sex premiere?
Premiered on September 29, 2013.
Where to watch Masters of Sex season 1?
Currently not available on the major subscription platforms (availability may vary by country).
What is the best episode of Season 1?
According to the public rating on TMDB, the 1x12, "Manhigh", with a 8.3.




















Season 22014 · 12 ep. ·
Season 32015 · 12 ep. ·
Season 42016 · 10 ep. ·