Products of Discovery

S5 E1: In the season premiere, when Brenda's squad investigates the quadruple murder of a family, she accidentally stumbles into the middle of an FBI investigation that may have been a factor in the homicide. Meanwhile, Provenza's mood suddenly turns sour. Guest star Lee Tergensen ("Oz," "Wanted") appears as Nicholas Carey and recurring guest star Stephen Martines appears as Ricardo Ramos.