The big wheel of cheese in this episode is Double Gloucester, a traditional, semi-hard cheese which has been made in Gloucestershire, England, since the 16th century. At one time it was made only with the milk of the nearly extinct Gloucester cattle.
The possible concern Abby Lockhart had about the boy who fell from the roof cleaning leaves from the gutter is "avascular necrosis of the femoral head." This is a serious condition that can be corrected with surgery. Medically explained it is a pathologic process that results from interruption of blood supply to the bone. AVN of the hip is poorly understood, but this process is the final common pathway of traumatic or nontraumatic factors that compromise the already precarious circulation of the femoral head, which is the top of the femur, colloquially called the thigh bone.
J. Grant Albrecht, who stars as the wheelchair-bound father, starred in season 12's "Graduation Day" as a skeptical ICU doctor while Morris was giving a pitch about a new medication.
Frances Conroy takes over the role of Sarah's grandmother.