Every episode of the show is named after a famous song. "Sleeping Monster" is the title of a song by Killgore.
Jennifer Bassey, who plays Nancy Dawson, Ethan Dawson's grandmother, & Justin Bruening, who plays Dr. Kepner's boyfriend, Matthew Taylor, previously worked together on All My Children, although they share no screen time here. Bruening's wife, Alexa Havins, who was also on All My Children with Bruening & Bassey, played Thatcher Grey's girlfriend Dani, the "tatted-up skank", in season 7, & also had a small part in 27 Dresses with former Grey's Anatomy star Katherine Heigl, as the bride on the boat at the end of the movie along with Bassey, who played Heigl's characters aunt.