As Chris and Rita struggle with how a romance will affect their partnership, they agree to set their feelings aside for now. And with Todd Barnett's death shifting Rita's case to homicide, Chris is forced to work with her temporary partner, Michael Price. The three cops all suspect Grant Everson, citing his threats to kill Barnett. However, without more evidence tying Everson to the crime, Donovan won't risk the political fallout of an arrest. And when a tip leads the cops to security expert Dallas Pike, surveillance photographs made just prior to the bomb blast suggest he bought the explosives used to murder Todd.