After Allison is mugged, she decides to take charge by enrolling in self-defense classes. Also, Devalos investigates a teenager's rape and an undercover cop's possible murder, and the suspect may have very close ties to Scanlon.

Scanlon is haunted by dreams of his late brother, leaving Allison concerned about her colleague. Also, while making her final preparations for college, Ariel has visions of missing young women, past and present.

Quando Allison si immischia nell'omicidio di una ragazza scomparsa crea inavvertitamente un attrito con Scanlon, deducendo che il fratello defunto potrebbe essere collegato al crimine. Intanto, Ariel si prepara a partire per il college. Guest star dell'episodio: Tom Wopat.