Shortly after her Blue Bloods episode, Caitlin FitzGerald joined Showtime drama Masters of Sex as the wife of title character Bill Masters (Michael Sheen). The TV show is based on a novel of the same name, which follows two sexologists studying human sexuality in the late ’50s through the ’90s.
Throughout the show’s four seasons, Libby Masters is one of the main characters that audiences saw develop throughout the story. Starting out meek and feeling guilty about not being able to give her husband a baby (audiences knew Bill was in fact infertile), she grows into a strong character willing to do whatever makes her happy. That includes taking part in a few different affairs, but since her husband has had one for 10 years, viewers excuse it. Libby is often torn between wanting to be happy and needing to be faithful to her husband, even in a marriage that is quickly falling apart.
FitzGerald expressed his disappointment when the show ended, but thought fondly of the experience in an interview with Vulture. “I certainly had a very satisfying exit for my character,” she said, also underscoring the importance of the series and its message. “So many women are still struggling to define themselves, for themselves, and not just in a relationship with a man.” Hopefully, Masters of Sex has helped some women figure out how to do just that.