Officer Malloy pays tribute to Officer Tom Porter, who has recently fallen in the line of duty. Malloy recounts the close friendship they developed while training at the academy, as well as the moments where they crossed paths on duty, including the night of the officer's unfortunate demise.

1-Adam-12 is back on the streets after routine maintenance, but the radio isn't working properly. During an armed robbery involving two suspects, Reed captures one while Malloy takes off in pursuit of the other one through Griffith Park and loses control of the car, and it rolls into an embankment hidden from the road, with Malloy suffering severe internal bleeding and a broken leg. All available units are called in to search for Malloy, who has to watch helplessly while a suspect hiding in the park takes his shotgun (which Malloy was using as a splint for his leg) and sidearm, and tears off the radio microphone leaving only leaving the wires. Malloy uses the wires to send a signal for help, which Reed picks up and is able to rescue his partner.

An 'officer needs help' call comes in with no callsign or location. The dispatcher starts a division wide radio "roll-call" in order to account for every officer on patrol. While the roll-call is going on, calls for service from the public still needs to be handled. When a motorcycle officer fails to check in when prompted, a division wide search is instituted to look for him, which Malloy & Reed are assigned to assist in.

While on a quiet patrol, Reed decides to spend part of his lunch break doing business at his bank while Malloy waits in the patrol car. Unfortunately, he walks into the clutches of a pair of ruthless robbers who take him hostage.

Malloy and Reed search for a six-year-old girl in a red sweater who was kidnapped. Malloy finds the girl in a neighbor's house – the neighbor has kidnapped and raped the girl, and she is unconscious. The perp attempts to escape, Malloy catches him and loses his cool when the suspect claims that the girl was "asking for it." The suspect files excessive force charges against Malloy, which he admits to; he knows he will be punished by his old mentor, Capt. Moore which may derail his ambition to become sergeant. Moore gives Malloy a four-day suspension for his actions. Other calls include rescuing a man who got stuck in the storm drain system.

It's been a long night of patrol for Malloy and Reed. Just as the two tired officers are headed to the station to turn in for the night, shots are fired at the patrol car. In the blink of an eye, Reed kills whom he believes was the gunman. Back at the station, Reed undergoes a night of intensive questioning from the captain and lieutenant, as part of the superior officers' investigation into the incident. In the end, the captain confides in Reed that his story is credible and the rookie officer will likely be allowed back on patrol upon the completion of the investigation.

Malloy has to shoot one of two robbery suspects, then the officers counsel a young woman in a bad neighborhood not to hang around (she is later kidnapped by two men claiming to fix her car), the LAPD's Air-Ten helicopter is used to catch the kidnappers (who already had outstanding kidnapping warrants), find a "mover" (burglar) whose partner hides in a freezer, and the officers visit an apartment on a domestic dispute complaint and find another woman with severe injuries but the couple insists nothing is going on, later arresting the husband on domestic violence charges after the woman's mother calls the police back to the apartment after the woman's husband beats their daughter.

Malloy celebrates his birthday by having to let Reed drive 1-Adam-12 (due to Malloy allowing his driver's license to expire) and is nervous about his young partner driving the car. Calls include a bank robbery reported by the Bank robber, a burglary involving several neighbors, an abandoned baby, a suicidal wife who killed her husband on their 22nd wedding anniversary, and a drug dealer selling his wares out of an ice cream truck.

Reed spends an evening on the firing range, then stops by an all-night grocery store. When Reed leaves, a man approaches him as if he knew him, then points out another man in a green Beetle holding a gun on the officer. Reed drops his groceries, shoves the man, jumps and fires at the Beetle driver, hitting the car, but the man in the Beetle shoots his accomplice. The grocer swears he only heard one shot, and the accomplice gives a dying declaration that Reed was trigger-happy and shot him, leading to Reed's suspension. Malloy and his by-the-book replacement partner locate the green Beetle (now yellow) after going through numerous DMV checks and locate the other man, exonerating Reed.

Reed is suffering from a wrist injury which puts him on desk duty, while Malloy has to break in a new rookie partner. Reed's day is far from routine as he has to handle a bomb threat that results in the evacuation of the station, Officer Brinkman accidentally discharges his shotgun twice, a young man wants to report misconduct by a police officer, an elderly man brings a shotgun into the station to drop off, Malloy brings in a group of children abandoned by their mother, and Malloy and his partner pursue a car into the police parking lot, where the suspects are arrested.

Malloy tries to prove Sgt. MacDonald's innocence when Mac accidentally hits and kills a jaywalker while driving his police cruiser. Every witness on the sidewalk claims she was in the crosswalk, and the burglary suspect MacDonald is transporting is unmotivated to testify on his behalf. The truth proves to be far more complicated than the officers realized.

Reed becomes preoccupied with the well being of a friend, an electrical engineer by profession, who has just qualified as a reserve police officer and has the bad luck of drawing Officer Wells as his partner. On patrol, Reed and Malloy help out a group of distrusting young adults who are planning to illegally camp in a public park after a rock concert, pull over a young couple in a stolen car and aid wells and the reservist in the foot chase of a heavily armed man who has been coercing innocent strangers into committing bank robberies.

Officer Charlie Burnside pulls a prank on Officer Albert Porter, a friend of Reed's. Porter, who does not find the prank funny, informs Reed that Burnside is frequently "badge-heavy" (rough) with his suspects. After dealing with an inept would-be robber, Malloy and Reed observe Burnside choking a suspect. Reed reports the incident, but nothing is done by the Captain because the victim would not admit Burnside was the aggressor. Burnside turns cocky on Reed saying he has "an ace in the hole" and that Reed was mad about the prank he pulled on Porter, but it is later revealed that Burnside got to one of the robbers, placing him under investigation. At the end of watch, Burnside tries intimidating Reed, then tries brushing his intimidation off as a joke when he realizes the other officers are against him; when they all walk out, Burnside resigns.

Malloy and Reed are given an older cruiser with 300 miles to go until retirement. They quickly learn the car is extremely unreliable and barely works: the accelerator surges, the glove compartment door constantly drops on Reed's knees, the water hose breaks while they are sneaking up on a prowler suspect (actually just a man who once lived there), their malfunctioning taillights prevent them from writing a ticket to a citizen whose car had the same problem, the distributor cap fails when trying to respond to another call, and finally, after capturing a pursuit suspect, the car's brakes fail and the unmanned car totals itself on a light pole. Another call regarding a truck loading up at a warehouse leads to the arrest of a large group of organized burglars after Malloy notices a slight discrepancy in their otherwise foolproof plan.

Malloy and Reed begin today's patrol by responding to a call of a drunken woman threatening the patrons of a bar with a handgun. Afterwards, they search for a group of four carjackers who go on a robbery spree after targeting a man with a cache of guns in his trunk, and investigate the suspicious death of a mentally disabled man.

Malloy and Reed are on the lookout for a traveling business man driving a green pinto, who called his wife in Nebraska and told her he was going to commit suicide at 2 PM. Meanwhile, they search for a woman who abandoned her newborn baby in a garbage can, and get a tip from an elderly woman about a group of car strippers.

A "child-left-alone" call turns up a horrifying case of child neglect. A 6-year-old girl is left home with her baby brother and both parents are unable to provide for their children.

Malloy and Reed are the first to respond to a downtown rooftop sniper who has been indiscriminately shooting at anyone he can find with his scoped rifle. After risking their lives to get civilians out of his line of sight, they become lead participants in the S.W.A.T. team's attempt to neutralize the suspect.

Truancy is on the rise in the district and Reed has a plan to pick up truants on the street, which was approved after a garage break-in by two truants. Results show a drop in crimes committed by truants, in one case two truants were stopped by the police and were implicated in a burglary, and one of the two truants involved in the garage break-in is brought in on another incident. Other incidents include arresting two heroin smugglers who hid the stash in their car's gas tank, which leaked some of the contraband making the car stall, and stop car thieves from stripping parts to build a dune buggy. Starting with this episode, Officer Ed Wells is promoted to Police Officer III (just under Malloy's rank of Police Officer III+1).

Malloy and Reed are sent to assist the Los Angeles County Sheriff's Department with transporting a prisoner from Malibu to Los Angeles for outstanding traffic warrants. During the trip, the prisoner reveals he is also a witness in a mob murder and a hit has been ordered on him. Suddenly, the cruiser is ambushed on a rural road, a tire is shot out, and they crash on a dirt road out of radio range. Reed is captured by hitmen attempting to get assistance, but Malloy and the prisoner steal the hitmen's car to get to a phone. The LAPD sends a police helicopter to search for Reed, who ends up overpowering the hit men and are captured.

Sgt. MacDonald's anniversary is coming up and the officers have limited funds to spend on a gift, which is a bottle of champagne, but when the officers pick it up, the owner of the liquor store was shot in an attempted robbery. Malloy and Reed later find the robber dead in a park from a gunshot wound inflicted by the owner. Other incidents include a paralyzed ex-wrestler tearing up a bar, a man driving suspiciously turns out to be the proud owner of several traffic tickets in a 24 hour period, a used car dealer trying to take advantage of a Mexican customer who speaks little English, and two camper thieves pushing a truck with a camper that is too small for the truck bed.

Malloy's old landlady, Mrs. O'Brien, has her purse stolen and refuses to leave the station until her case is settled. Mrs. O'Brien resorts to other means, including hounding detectives and setting up a picket line to vent her frustrations. Malloy makes connection between her theft and a string of purse snatchings involving social security checks, and a decoy leads to the end of the theft ring. Calls include two suspicious men and a pursuit involving them, and a homicide where candy wrappers and tire tracks from the pursuit suspects are found.

While on second shift, Malloy and Reed take Police Commissioner Dixon on a ride-along. They encounter a bar owner who locked a naked, elderly man inside, a fight with a knife-wielding man and another man with a gun, and a missing 17-year-old deaf boy with mental instabilities, which Reed recognizes as the boy that escaped his foot pursuit in the previous episode.

Malloy and Reed are stunned to discover that the driver who led them on a high-speed chase is the son of Sgt. MacDonald, and Malloy takes it upon himself to help his boss figure out why the young man is acting out. In the meantime, they investigate a possible burglary in progress at an apartment building, mediate a dispute at a park over an elderly woman feeding ducks, respond to a call of two armed men fighting over a woman and deal with a wino who is attempting to direct traffic at a busy intersection.

Reed returns from an off-day with an uncomfortable full-body sunburn, which causes him problems throughout the watch. Calls include responding to a traffic accident, acting on a tip from an informant, busting a drug dealer working out of abandoned homes, searching for a robbery suspect based on a vehicle description, and assisting in the rescue of two boys when their boat capsizes.