Emily Blunt is allergic to horses, but she learned to ride for this series, and relied on antihistamines to counteract her symptoms.
The Irish tune being played offscreen while Cornelia and Richard are having dinner is "Dirty Old Town," a 1949 song popularized by both The Pogues and Dropkick Murphys.
Cornelia reveals that her son was born out of wedlock.
The title of this episode comes from Eli telling Cornelia that the "difference between what you need and what you want is what you can put on a horse."