Vincent D'Onofrio as Governor George Willburn, the governor of California Alice Englert as Nurse Dolly (season 1), a nurse trainee at Lucia State, and Edmund's love interest Amanda Plummer as Louise, the owner of the motel that Mildred and Wainwright stay at and longtime friend to Nurse Bucket Jermaine Williams as Harold (season 1), a security guard at Lucia State Annie Starke as Lily Cartwright (season 1), a patient at Lucia State who is being treated for her lesbianism. Brandon Flynn as Henry Osgood, Lenore's psychotic killer-turned-amputee son who was disfigured by Dr. Hanover when he was his patient. Michael Benjamin Washington as Trevor Briggs (season 1), Gwendolyn's husband with whom she is in a lavender marriage.