Now back on active duty, Sipowicz (Dennis Franz) disagrees with Detective Walker (Robert Breuler) over the guilt of a robbery-homicide suspect -- but uncharacteristically keeps his mouth shut. Though no longer moonlighting as the bodyguard of wealthy Susan Wagner (Wendie Malick), Kelly (David Caruso) nonetheless issues a harsh warning to Susan's abusive husband -- who subsequently turns up dead. Kelly's estranged wife, Laura (Sherry Stringfield), prepares to join the narcotics division of the DA's office. And Laura's neighbor Goldstein (David Schwimmer), now a neighborhood hero for his shooting of a mugger, becomes increasingly, and dangerously, paranoid. ~ Hal Erickson, Rovi