The Walking Dead’s Emily Kinney has joined the third season of Showtime’s Masters Of Sex in a multi-episode arc. Set in 1966, Season 3 finds the famed duo of William Masters (Michael Sheen) and Johnson (Lizzy Caplan) dealing with the glare of the national spotlight as their sex study finally is unveiled. It’s the start of the Sexual Revolution — and Masters and Johnson’s work will have a profound impact on contemporary relationships, especially their own evolving three-way “marriage” with Masters’ wife Libby (Caitlin FitzGerald). Kinney will play Nora, who was Bill and Libby’s neighbor as a child. Now in her 20s, Nora volunteers to become a sex surrogate in the next phase of Masters and Johnson’s research. Kinney’s TV credits include The Following, The Good Wife, The Big C, Law & Order: Criminal Intent, Law & Order: SVU and the upcoming Season 2 of The Knick. She is repped by Paradigm, Anonymous Content and Frankfurt Kurnit. Masters Of Sex Season 3 premieres July 12 at 10 PM.