Masters of Sex (Seasons 1–4)

Masters of Sex (2013) is a Showtime drama you can watch online on iFILM. Michael Sheen plays William Masters, a Washington University gynecologist who decides to bring human sexuality into the laboratory — with data, instruments, and observation rooms. Lizzy Caplan is Virginia Johnson, a twice-divorced secretary with no degree and more instinct about people than most doctors in the building.

Masters can run a department and charm a board, but he cannot say what he wants from the woman working beside him. Johnson needs the job, believes in the research, and quietly becomes indispensable. His wife Libby (Caitlin FitzGerald) watches it all from a careful distance. What starts as a clinical study of the body turns into something neither of them planned.

Based on the biography by Thomas Maier, the series ran four seasons and 46 episodes on Showtime, tracing the pair from a midwestern hospital basement to national magazine covers. It earned a Peabody Award and stood as one of Sony Pictures Television's strongest cable dramas of the early 2010s. Stream all seasons of Masters of Sex online on iFILM.