Donna Lynne Champlin's birthday landed during the shooting of this episode; the crew surprised her by wheeling out a cart full of cakes.
Dream-Dr. Akopian mentions how hard it is to pass the "Bechdel test" as a dream ghost. The Bechdel test is a metric used to evaluate works of fiction; the standard criteria are that the work must include at least two female characters, and these characters must talk about something other than a man.
The "Dream Ghost" musical number is modeled after the Dream girls musical title track. It is also featuring Amber Riley as a background singer/dancer who not only sang "And I am Telling you" on Glee, a song from Dreamgirls, but also starred in the musical on the West End in London.