4. Thank You for Coming

With the study back in the hospital, Bill and Virginia recruit new participants on campus. Virginia has a one-night tryst with her ex-husband, George, who appears at the hospital, having signed up as a study participant. Bill begins sleepwalking, possibly due to anxiety. His mother comes to visit, and suggests that she move to an apartment close to them to spend more time with the baby, but this stirs up painful childhood memories of the physical abuse Masters suffered at the hands of his father, and his mother’s inaction in the face of it. Libby's attempt at playing matchmaker with Virginia and Ethan does not go smoothly. Ethan ends up forming a relationship with Provost Scully’s daughter, Vivian. Masters snaps at Virginia's son at a dinner party, which disturbs Libby, who witnesses this.