An assassination attempt against Mayor Cleveland during the rededication of the Monarch Theater opens up a nest of corruption in Daniels' office; several officers catch the ""blue flu"" and head for Las Vegas with Belker, who wins $5000 on a free spin; Vera Horvath continues to hound Stan; and Hill and Renko try to settle a dispute involving a stolen lottery ticket.

Belker, LaRue and Washington go undercover as garbagemen to investigate a protection racket; Fay tries to help an elderly rape victim identify her assailants; Hill runs for PBA representative; and Mayo gets proof that the hispanic rape suspect can speak English.

Detective Phil Dugan cuts some corners to catch an elusive mobster; Goldblume pursues a solitary investigation into Gina's death; Hill and Renko try to help a homeless family caught up in red tape; Coffey gets to ride with Jablonski; Calletano and Hunter test for the captain's position; and everyone faces a random drug screening.

Hunter hallucinates he's aboard a Russian submarine; Belker finally gets married; Renko busts his favorite country singer again; Furillo meets with a political power broker about the Chief's job; Hill takes his daddy home to St. Louis for his burial; Buntz' old partner comes asking for help with a loan shark; and LaRue and Washington use a lady tattoo artist to help them find a killer.

The Hill reaches a crisis point of outraged citizenry and stampeding press coverage when Hill and Renko rescue an escaped mass murderer captured by a vigilante mob, and Belker can't stop being a cop even as he coaches Robin through labor.

On his way to work, Hunter shoots a boy robbing a convenience store; Jablonski refuses to follow his doctor's orders about heart surgery ; the P.D.'s go on strike over job cuts by the city council; Belker struggles to protect senior citizens victimized by a violent mugger; and LaRue and Washington stake out a luscious young woman suspected of being a fence.