When Martha walks in to see Beckett making breakfast, Martha calls Beckett Kate. In most episodes Martha is the only one to call Beckett Katherine.
Dameon Clarke playing a serial killer, starred in a movie "How to be a Serial Killer".
This episode, and its predecessor, reunites Nathan Fillion and Dana Delany who previously played a married couple on Desperate Housewives (2004) during the show's fourth season.