The fourth season of NYPD Blue begins with a clean-and-sober Andy Sipowicz (Dennis Franz) finally coping with the death of his son Andy Jr., but obsessing over the care given his baby boy, Theo -- so much so that it seriously affects his work. On the verge of proposing to Diane Russell (Kim Delaney) -- who, like Sipowicz, is still trying to get over her booze habit -- Bobby Simone (Jimmy Smits) inherits an apartment building and immediately clashes with the eccentric nephew (Willie Garson) of his benefactor. A body in a trunk shows up in the wrong precinct, causes all sorts of red tape. And Greg Medavoy (Gordon Clapp) decides to go on a diet. ~ Hal Erickson, Rovi