The piano piece that Boyd Langton plays for Adelle DeWitt over the phone is Fantasie Impromptu by Frédéric Chopin. It is a piece noted for its unique and difficult time signature with the right hand playing semiquavers and the left hand playing triplets.
Echo's real name is revealed to be Caroline Farrell when a college professor recognizes her.
The campus map that Sam shows Echo is actually the campus map of The College of the Canyons, in Santa Clarita