Blonde, Brunette, Redhead: Agent Reyes finds out that there is a Serial Killer at large and that his pattern consists murdering women in a set of three. Each set has a blonde, a brunette and a redhead. Redheaded Agent Scully and dark-haired Reyes get trapped in an underground garage and fear they might be his next targets.
Breather Episode: The killer is played for drama but the rest of the episode is light and in fact, good natured especially compared to the rest of the grim Season 9.
Numerological Motif: The whole episode deals with numerology and tries to show everything can be expressed in terms of numerological patterns.
Serial Killer: He targets women and kills them in a set of three.