Mannion goes missing after he is shot by a Russian mobster's daughter and though the others fear he's been left for dead, he's merely staying hidden until he can figure out who was behind his attempted murder.
Presumed dead, Mannion is free to go after the government offical who may have tried to have him killed which leads him to Paris, and Temple is accused of cocaine possesion after a routine traffic stop.
Fed up with the havoc child pornography is having on families, Mannion wages a war on the crime and tries to get more stringent legislation against it through the courts.
A string of robberies and carjackings are tied to thefts of pharmaceuticals.
When Debreno's brother, a priest, is shot at a funeral, Mannion takes it personally and tries tracking down the gunman.
The return of a hit-man who got away from him years ago and the discovery of an ex-convict's body found with $180,000 in a wrecked car heralds the reopening of an old case from Mannion's days as a cop.
His presence at a convenience store during a robbery makes Noland a suspect in the ensuing investigation.
Mannion must deal with a reporter who claims he ordered his troops to shoot 18 civilians during his tour of duty in Vietnam.
A native son boxer returns to D.C. for a big match but winds up behind bars when his wife is found murdered in their apartment.
As Mannion dons the Santa Claus costume, detectives investigate three elves who may have ripped off a Salvation Army truck right before Christmas.
As a friend lays dying of AIDS, Mannion tries filling in for her at an AIDS rally.
When a killer retracts his confession, Temple and Debreno are hard pressed to find concrete evidence to make the conviction stick.
When a man taken into custody appears to have a mysterious infectious disease, police headquarters is put under quarantine.
Mannion and Vanessa trip to Los Angeles takes a turn for the worse when they get carjacked.
Debreno plays bodyguard to a pop star targeted by several death threats.
After witnessing a jeweler's murder, Mannion's uncle pressures him to pursue every avenue to solve the crime.
As Debreno and Temple try to hunt down documents missing from a corporate fraud trial, Mannion locks horns with the head of the Dept. of Roads and Highways after a serious vehicle accident injures two of his officers.
Mannion comes to believe that a serial killer is targeting interracial couples. Meanwhile, Nancy tries to come to terms with her father.
In the ongoing battle between the mayor and the chief of police, Mannion's career is imperiled, first when a suspect dies in police custody, then when the mayor's son goes missing.
When allegations of police brutality causes rioting in the streets, the mayor seeks to calm the situation by firing Mannion.
As friends and family gather to bury Ella, a grief-stricken Mannion learns he's been fired and decides to leave the capital. Meanwhile, Debreno and Temple try to track down a murderer that keeps slipping from their grasp.
Just as Mannion tries starting a new life without Ella and away from Washington, the discovery of new evidence sparks re-investigation into an old unsolved case of his.