Hill wins $100,000 in the lottery; Deputy Chief Mahoney tries to ride herd on Furillo's precinct; mayoral candidate Benjamin Fisk moves into a crime-ridden housing project; Goldblume tries to help Hector Ruiz control the Diablos; and Coffey and Bates bust a couple of lady mud wrestlers.

LaRue and Washington salvage a man's severed arm; Joyce defends a frantic West Indian cabbie; Hector Ruiz takes one final hostage; and Hill alienates many of his friends with his new attitude.

Bates and Coffey take over a storefront police/community relations project; a cop killer seems to be roaming the streets; Daryl Ann buys the wrong motorcycle for Renko; Joyce behaves oddly about buying a house; Leo and Ray try out an unorthodox method to get rid of the rats; and Daniels tries to short circuit Cleveland's corruption task force by exposing a network within the special Vice detail.

The rats return; Esterhaus is hospitalized for tests; Bates, Coffey and Joyce try to protect a woman and her children from her abusive husband; the latest cop killing looks to be a hired gun copying the random killer; and the corruption investigation strikes close to Hill Street; Hill Street gets word of the murder of Marty Nichols.