At the beginning of the episode, Addison's colleagues welcome her back from her trip to Seattle. This trip refers to the previous set of Grey's Anatomy and Private Practice episodes (both of which aired on March 31, 2011), in which Addison is called up to Seattle Grace to deliver and try to save Callie's baby, both of whose lives are threatened due to a severe accident. Upon being welcomed back to the Practice, Addison's colleagues ask how the trip went. Addison's reply of "It ended on a high note" is a nod to the very special Music Event of Grey's Anatomy, this episode containing several songs performed by the GA cast.