On Cuddy's nightstand, she has the novel "Ines of My Soul" by Isabel Allende, a fictionalized account of Ines Suarez, a woman who played an essential role in the conquest and colonization of what is now Chile.
This episode revolves around Lisa Cuddy with House playing a supporting role.
The episode title "5 to 9" is a play on the phrase "9 to 5" when referring to a typical working day.