The attacks continue as the gang prepares one final ambush before fleeing the city, but SWAT catches on and moves to disrupt them; in the ensuing operation, two of the gunmen are apprehended and Street kills the last, but he realizes revenge is meaningless and can never satisfy him.
Tracking them down to a remote farmhouse, SWAT besieges the Hopper family and uses tear gas to smoke them out, while Joey is killed when he takes the editor's daughter as a human shield.
Though she is no longer under threat, Janet, shaken by the losses she endured, decides to leave the city, and visits Street and the team one last time to bid farewell.
Later, SWAT is deployed for a plainclothes takedown when the kidnapped girl is spotted on a ferry, but when Cooper follows the team aboard and unintentionally provokes the kidnapper, the officers are forced to shoot.
Infamous drug kingpin Vincent Ritchie agrees to testify against his former associates before a committee, but is critically injured and hospitalized after his police escort is ambushed.
Olympic SWAT responds to a sniper targeting an ambassador, committed by the "Organization for the Freedom of Oppressed People", purportedly a Middle Eastern left-wing terrorist group active in California.
Unbeknownst to the police, the Organization is actually a front for a criminal group, part of a complex plot to rob the Owls basketball team (one player of which, Ollie, is a longtime friend of T.J.'s) for $2 million, using the terrorist charade as a way to pressure the authorities into acquiescing to their demands.
When the group launches their attack at the Sports Arena and takes the Owls hostage, Hondo's attempts to negotiate a release are stymied by political pressure and the wounding of a player, and he is forced to follow their demands.
With the attempted assassination a failure, a gambling magnate hires a professional hitman from overseas, who steals an ArmaLite AR-18 from a National Guard armory and prepares an ambush while enjoying himself in the United States.
SWAT surrounds the van and, after an intense standoff, manages to use paint shells and a flare launcher modified to fire gas to smoke out the fake guards and rescue Susan and Miss New Mexico.
After Stockwell takes Hondo as a human shield and T.J. shoots him, Brunner remembers the plant's override code—the date of the attack on Pearl Harbor, Franklin D. Roosevelt's "day of infamy"—preventing the explosion and saving the city.
Olympic SWAT shoots and arrests a gunman in an amusement park, devastating his young son, who may be without parents as his mother is hospitalized following a heart attack.
Meanwhile, a former parole officer scopes out SWAT's response in preparation for a heist at a coin collection auction; his crew plans to use a series of random shootings and explosions as a diversion.
A crew of thieves pull off a string of violent robberies with the same modus operandi: they hold up a jewelry store, take a woman hostage, and use her to intimidate the responding officers and get away before they can pursue.
A training exercise with another division's SWAT team is interrupted by the murder Officer Frank Baylor (Don Eitner), found with the words "Kill S.W.A.T."
Two teenagers seeking shelter in the warehouse of Colby Electronics anonymously alert Olympic SWAT after a group of criminals break in and kill two police officers.
His escaped accomplices, aided by unscrupulous attorney Jason Bridges (H. M. Wynant), work to get the charges dropped and make Wilson a free man—by force.
Olympic SWAT is assigned to help transport convicted dope dealer Johnny Rizi (Frank Gorshin) to prison, but his former associates seek to silence him before he can testify against them.
Marco (Peter Breck), an arsonist posing as a firefighter, engineers a fire during Southern California's dry season in the area's most affluent neighborhood, Sherwood Heights.
Hondo's old friend, millionaire Doris Wainwright Bristol (Anne Francis), has brought expensive jewelry into the hospital where she is undergoing cosmetic surgery.
Olympic SWAT, who along with Hilda (Rose Marie) are at the hospital preparing for the children's Christmas party, find themselves forced into action when the discovery of DeLeon's body leaves Doris unprotected.
David Neal (Stuart Whitman), a government agent who spent four years on an undercover assignment posing as a crime boss's lieutenant, is marked for death after his testimony sends the kingpin to prison for life.
During the investigation, Luca sets up a double date for himself and T.J. with Sharon Merlingdale (Monie Ellis), a witness from another case and a student at a prestigious all-girls school, and a classmate.
While Olympic SWAT is assigned to investigate the burglary-murder as part of their ongoing effort to locate the source of the weapons, John Haskins (Mark Stevens) recruits his Eastern mob partners to find his son's killers.