Caitlin FitzGerald has distinguished herself on the Showtime cable channel's "Masters of Sex," a series chronicling (with some artistic license) the work of 1950s human-sexuality researchers William Masters and Virginia Johnson.
Ms. FitzGerald plays Libby Masters, William Masters' wife, whom he eventually left to marry Johnson. The online magazine Indiewire describes her character with considerable respect and detail: "Libby Masters is a character who could easily have come across as insipid instead of likable and poignant . . .. FitzGerald fully conveys Libby's willowy fragility, her fairly sheltered outlook and girlishness - she sometimes calls her husband "Daddy" - while making it clear she isn't a simple stand-in for conservative values or cluelessness . . . FitzGerald makes Libby's perceptiveness and her transparency clear."
She has been in movies such as It's Complicated (as the daughter of Meryl Streep's character) and the indie movie Newlyweds, playing a newlywed woman in a relationship that becomes, well, complicated when her sister comes to live with her and her husband.