The piece of jazz-music Peter plays for Olivia towards the end of the episode is "Someone to watch over me" by George and Ira Gershwin.
The glyphs at the commercial breaks spell Aeger which is Latin for "Sick".
The train station used for the episode which was set in Massachusetts, is actually the Yonkers Metro North Train Station in Yonkers, New York. Interior and exterior shots as well as the surrounding streets were used.
The character of Roy is a reference to the late author David Foster Wallace. Roy's costuming, clothes, and makeup all resemble DFW's style. In the end of the episode, Roy's bandages echo DFW's trademark bandana.
At the funeral the Marine Lance Corporals (E-3) were wearing red stripes (Blood Stripes) on their trousers. This privelege is only worn by Corporals (E-4) and above.