When Rigsby goes to the mixer, the cuff link on his right sleeve is on backwards but gets righted in the middle of the scene.
At the beginning of the episode Jane says to Lisbon: "Do you know, in seven years, each and every cell is completely replaced in your body?". That is not entirely correct. While it is true that individual cells have a finite lifespan and are replaced when they die, this doesn't happen to all cells - for instance cerebral neuron don't get replaced when they die and cardiomyocyte heart cells are replaced at a reducing rate as we age. Even in people who have lived a very long life, less than half of the cardiomyocyte cells have been replaced. Those that aren't replaced have been there since birth.