Jack Mannion is greeted with hostility as soon as he's hired as the new chief of police in Washington D.C.

Mannion is pressured to solve a rich college kid's murder.

Mannion is met with resistance in trying to clean up the worst block in the city.

The FBI gives the police an order to participate in a rehearsal for a possible terrorist attack.

Several officers who were caught stealing on the job by Mannion are needed to control a riot when Fidel Castro visits the city along with a Cuban admiral who bombed many exiles.

Ricky's father goes on trial for killing the boy's mother, Temple tries to talk a victim into testifying against a serial rapist and Nick discovers shocking evidence against the mayor.

A criminal called the Jackal is stalking old people, emptying their bank accounts and murdering them.

Mannion goes after a dealer supplying drugs to rich executives, while his ex-wife shows up with some bad news.

At Christmastime, two groups of Santas go to war over the best corner to collect contributions to charity.

Temple leads an investigation to catch the D.C. Strangler, a serial killer who's strangling prostitutes.

Mannion gets personally involved in the case of a missing husband, while McGregor threatens a former IRA gunman in D.C. for peace talks.

Mannion looks for a vigilante killing men convicted of molesting children.

Mannion tries to reunite a troubled boy in foster care with his mother, who's in prison on drug charges.

Mannion promises to provide better protection to cab drivers after one shoots a passenger he thought was trying to rob him.

Mannion goes to New York for his ex-wife's wedding, while an ex-cop accuses Noland of covering up a case from 30 years ago involving a politician's son.

A respected Vietnamese colonel is suspected of running a sex-slave operation using kidnapped Asian girls when one is found dead.

Mannion attempts to take down the leader of a gang who shot down a rival and make a suspected arsonist confess to starting a fire in a park.

Mannion learns that his son's girlfriend has been supplying his son with an illegal drug.

Mannion investigates an off-duty white cop for shooting an undercover black cop in the back during a stakeout.

Temple goes undercover in a fencing operation to catch crooks on tape bringing in stolen property.

The FBi investigates Mannion when he contacts an old informant from the Russian mob about a bank robbery where two ex-cops were killed.

Mannion is suspended from the district as the FBI continues to investigate his ties to the Russian mafia.