Masters of Sex

Dr. William Masters runs a successful medical practice and conducts a secret study of human sexuality; a former nightclub singer proves to be an asset to Masters' work.

Johnson considers her best course of action; although Masters blames Johnson, he needs her to manage the chaos of doing the study at a cathouse.

When research at the brothel creates inaccurate data, Masters resolves to get the study back to the hospital; Libby tries to conceive; Dr. Haas gets the case of a lifetime.

Masters and Johnson recruit new participants; Johnson's ex-husband wants to sign up; Libby tries to play matchmaker.

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.

As Masters (Michael Sheen) and Libby (Caitlin Fitzgerald) struggle with the fallout from her miscarriage, Johnson (Lizzy Caplan) proposes a study that challenges Freud’s theories of female sexual response. An unsatisfying sex life at home leads Margaret Scully (Allison Janney) to volunteer for the study.