As House and Cuddy clean up after her birthday meal, the Bach piece playing in the background is "Wachet Auf," which translates to "Sleepers, Wake!" It's appropriate since Wilson and Cuddy's mom are both passed out at the dining room table in that scene.
This episode mirrors the real-life story of Wesley Autrey, a construction worker who saved a person who fell on the NYC subway tracks while having a seizure.
Opening credits show Peter Jacobson's name swapped with Jesse Spencer's.
Although the background music while Cuddy and House wash the dishes may have been "Wachet Auf" from Bach's Cantata 140 (a choral piece) when the episode originally aired in 2011, on Netflix, as of June 2014, the music is the second movement from Bach's Orchestral Suite No. 3 in D major, BWV 1068 (commonly called "Air on the G String").
At the end of the episode when House is in his apartment watching TV, the sound is actual audio from "The Real Housewives of New Jersey."