Hanson gets assigned to the Jump Street unit, a special division of the police force which uses young cops to go undercover and stop juvenile crime, when his youthful appearance causes him to be underestimated while on patrol. His first case involves catching drug dealers.
Hoffs goes undercover to keep a wild Eastern Bloc exchange student out of trouble. Hanson and Penhall enroll in a shop class suspected of being a chop shop for an auto theft ring.
A woman with car trouble whom Hanson helps out and makes a date with turns out to be a teacher who has been getting threatening messages and whose class he has been assigned to undercover.
Hanson and Penhall infiltrate an exclusive preppie clique to investigate a prank that left a girl dead.
Hoffs is not convinced that the captured suspect in an arson case at a Catholic girls school is the guilty party and believes that the real culprit will strike again at the school's prom.
Jenko is killed by a drunk driver and is replaced by Captain Fuller who has his hands full dealing with a vengeful gang leader whom has taken his principal and several others hostage, including an undercover Hanson.
Hanson and Penhall try to locate some missing juveniles while Ioki tries to find a link between a teenage prostitution ring and a series of burglaries.
The daughter of a policeman who claims her father is sexually abusing her tries to hire Hanson-- undercover with Penhall as one of the drug dealing McQuaid brothers-- to kill her father.
Hanson who is out to catch a loan shark finds his cover threatened when his high school quiz team makes it to the semi finals which are to be broadcast on TV.
Penhall joins the school baseball team in order to keep an eye on one of its star players, whose life has been threatened when his father agrees to testify against the mob.
Hoffs enrolls in a teen modeling school after several of its graduates end up appearing in pornography.
Hanson goes undercover as a punk rocker in an effort to stop a feud between two rival gangs from turning into a war.
The Jump Street unit discovers that a boy who was being used as a pawn by his feuding parents faked his kidnapping with the aid of his grandfather to get away from his parents.
Hanson and Hoffs go undercover in order to put a crack ring out of business. Penhall, working on the same case, returns to squad car and becomes convinced that his new partner killed a drug pusher.
The Jump Street unit is investigating a counterfeit drivers license ring when Captain Fuller gets arrested for drunk driving.
Hanson is unable to keep his mind on the investigation of a shooting of a teacher at an inner city school when he learns that his mother is moving in with her boyfriend.
A pregnant school girl fingers Ioki as the father to be.
Racial violence threatens to break out at an integrated school when word leaks out that a white student got a black student pregnant.
Hanson and Penhall find the military code of honor hampering their undercover investigation of a military academy where the cadets are suspected of killing homosexuals.
Hanson and a film star he had been assigned to protect are kidnapped by an escaped murderer.
Penhall gets close to a football player suspected of using steroids at a school where an olympic hopeful gymnast died after a performance due to steroid abuse. Hanson considers becoming a big brother.
Ioki faces being dismissed from the force when internal affairs discovers that he is a Vietnamese refuge who is using an alias. Flashback sequences show his escape from Saigon.
Hanson contemplates leaving the force and leaves town instead of going to a refresher course at the police academy he and Penhall had been assigned to take after they went drag racing to try to catch a hit and run driver.
Dorothy an old girlfriend of Penhall's, who walked out on him two years ago, returns and decides to move in with him. Hanson gets assigned to protect a student with AIDS who is being made to feel unwelcome in class.
Past romances that didn't have happy endings are the subject of conversation at a Valentine Day Eve poker game.
Hanson becomes trapped in a private drug clinic where he had himself placed in order to investigate claims of patient abuse made by a kid he once busted on drug charges.
Hanson blames himself for failing to prevent the shooting death of his girlfriend in a convenience store robbery and becomes obsessed with revenge.
Penhall & Hanson go undercover as the McQuaid brothers in a suburban high school, that recently has had inner city kids bused in, to investigate the theft of a Porsche. Meanwhile, Judy must deal with a love-sick teenage boy.
When a small-town teacher refuses to teach the theory of evolution after his son has a near-death experience, Hanson infiltrates the school to try to discover who's behind the recent burning of the science books.
Penhall and Ioki go undercover as the "Swark Twins" to get in with teenage boys working for drug smugglers. Meanwhile, Hoffs becomes romantically involved with the head drug smuggler.
The suicide of a popular student, whom Hanson and Penhall had arrested the night before, leaves his family, fellow students and Hanson in a state of depression and forces Penhall to relive bitter childhood memories.
Hoffs and Penhall must deal with a pursuing husband when they are assigned to escort a girl arrested for killing her father when he tried to prevent her from eloping.
Hanson goes undercover to find a student who is blowing up toilets. Meanwhile, Fuller must convince the higher-ups that the Jump Street program, which is scheduled to be deactivated over the summer, should be reactivated in the fall, and Doug decides it's time to grow up.
Hanson is assigned Booker as his new partner and the two don't hit it off as Booker's racist attitudes lead Hanson to believe that Booker raped a black student.
Hoffs and Ioki go undercover in a Guardian Angel-type street patrol whose members have a vendetta out for a drug dealer who Hanson is trying to set up for a bust.
A popular sports writer finds his whole life ruined when Penhall believes his ex-wife's allegations of his being a child molester.
Penhall and Booker join a high school football team in attempt to prove that the coach's negligence led to the paralyzing injury of one of the players.
Hoffs goes undercover as a pregnant teen to investigate threats of violence being made to a family planning center by anti-abortionists.
Hanson and Ioki must endure hell week as fraternity pledges in order to gain the confidence and get evidence on a gang rape which occurred at a frat party.
While working undercover in a Vietnamese streetgang, Ioki learns of a communist businessman who may be able to help his grandmother who is still in Vietnam.
Everyone in the Jump Street unit gets blue flu when the police force goes on strike forcing Captain Fuller to team up with a rookie cadet.
Hanson becomes an inmate in a juvenile detention hall in order to investigate the murder of one of the inmates.
Dorothy and Penhall split up forcing Penhall to move in with Ioki. Hoffs becomes involved with a city inspector, who is auditing Jump Street's records.
Penhall's encounter with a bully while undercover causes the members of the Jump Street unit to reminisce about their dealings with bullies while they were in school.
Hanson goes after an old friend who wrote an article exposing the Jump Street program causing Hanson to get suspended from duty.
An old Army buddy comes to Fuller seeking the Jump Street unit's help in bringing in an AWOL soldier who will be classified a deserter if he doesn't return to base within two days.
Booker is laiden with guilt when after he infiltrates a gang of drug users that kill one of their own whom they suspect is an undercover cop.
Fuller and the Jump Street unit are given a lot of flak and told to pull off the case when city hall learns Hanson and Penhall are about to bust the mayor's son on drug dealing charges.
The Jump Street cops enroll in a performing arts school to bust a drug ring being run there.
Undercover looking for a person who has been preying on homeless teens, the Jump Street cops learn what it is really like to live on the street.
Booker goes undercover as a radio DJ to discover who killed a controversial college radio personality by planting a bomb in his car.
Hanson finds himself on the wrong side of the law after he decides to seek revenge on members of a street gang who shot and seriously wounded Ioki.
Booker resigns from the police force after solving a case that gets Hanson out of prison.
Penhall gets caught up in the excitement as he and Hanson go undercover to bust a college gambling operation.
Hanson meets an old flame now married to the owner of a 80's nightclub suspected of providing LSD to high school students.
Penhall finds himself falling for an illegal immigrant from El Salvador when the Jump Street unit is sent in to investigate a priest suspected of selling babies.
The Jump Street team intervenes when a tough new principal goes too far in his attempts to clean up a drug and crime infested inner city school.
During a Halloween string of high school fires, Hanson becomes a bit skeptical of a teen age psychic claiming to be able to predict where the next fire will occur.
Penhall and Ioki become rent a cops while Hanson becomes a member of a clique of thrill seeking kids who break into houses to annoy the rent a cops.
While trying to expose a drug ring at a prestigious medical school, Hoffs is raped while on a date with one of the suspects who later claims that she seduced him.
Hanson and Penhall investigate the murder of a high school teacher's wife and discover that the teacher hired one of his students to kill her.
Working on a tip from Booker, the Jump Street cops join a motorcycle caravan in order to bring Raymond Crane to justice.
While observing a family suspected of operating a burglary ring, Hoffs begins to suspect that a boy is being abused.
Ioki is confronted by a teenage boy with a gun, who three years earlier Ioki had talked into turning in his drug abusing family.
The Jump Street Cops are sent to investigate a college chemistry lab where it is suspected that new designer drugs are being manufactured.
A lesbian student makes a pass at Hoffs when she and Capt. Fuller go undercover at a high school to learn the identity of a student who was a witness to a teacher's murder.
In the 21st century a young cop hoping to revive the Jump Street program interviews the retired officers who were there when it all started.
Hanson tries to convince a juvenile inmate on death row to appear in a film intended to keep his peers out of prison.
Hanson and Penhall expose a point shaving scheme when they go undercover to investigate the drug related death of a college basketball star.
Hanson and Penhall find a way to get out of the cold while remaining on the job as they trail a suspected bomber to Florida during spring break.
Penhall ends up taking his nephew back to America after he and Hanson travel to El Salvador in order to find Penhall's wife, whom they learn was killed in the fighting.
Donning their McQuaid brother aliases for one last time Hanson and Penhall discover a teenage girl who has kidnapped her baby sister to get her away from their abusive parents; while Penhall adjusts to becoming a father figure.
A handicapped policewoman asks Fuller to send her undercover to investigate a series of attacks on handicapped women; however, Fuller also send in Hoffs in a wheelchair.
When the leader of a neo-Nazi group is murdered, Hoffs & Ioki go undercover in the liberal group suspected of the killing. While Penhall joins the Nazis to learn if they plan a violent reprisal.
The Jump Street cops each relate a different version (with the teller as the hero of a film from their favorite genre), to a reporter investigating the foiled attempt to kill a senator.
After volunteering to become a Little League coach Penhall learns that one of the players was kidnapped by his father, from his mother and step-father.
After botching an assignment, Penhall is transferred to a different precinct where he learns the cops routinely accept bribes and finds himself the subject of a Jump Street investigation.
Hoffs, Hanson and Penhall find themselves at the mercy of a defiant gang when all of them become trapped inside a school with out power.
Hoffs and Garrett must deal with a DEA officer while working undercover at a massage parlor suspected of being a front for a drug operation.
Garrett attempts to infiltrate a high school drug ring by dating the sister of the ring's suspected leader.
McCann joins up to be the partner of a mentally handicapped youth in a school buddy system, to investigate the murder of the boy's former partner.
Doug falls for a narcotics officer with questionable tactics and a possible drug problem herself.
Hoffs is suspended from the force when while working undercover in high school she is forced to take a mandatory drug test and the results come back positive.
Doug has a strained reunion with his estranged younger brother Joey when Joey is assigned to the Jump St. team. Doug comes to his aid after Joey is brainwashed into joining a religious cult he was investigating.
Doug and Joey enroll in a wilderness camp for troubled teams to investigate a murder that happened there and find themselves constantly in trouble with the ex-marine who runs the place.
While investigating the hit and run murder of a high school football star, McCann becomes involved with a cheerleader who has AIDS.
Doug and Joey enroll in a college where good students are mysteriously being turned into criminals.
Doug is seriously wounded while on a case and while the doctors try to save his life he enters limbo where the people he meets there cause him to reconsider his choice of career.
After discovering that some white officers are responsible for beating and harassing black teenagers, Hoffs, with Fuller's help, try to convict them.
Hoffs, Joey and Mac help a raped girl that has no proof to convict the attacker.
Joey feels responsible for a baby girl he is taking care in a experimental program and try to find her drug addicted mother.
After finding the missing daughter of a famous reporter, Mac tries to solve the mistery behind the missing.
Mac has to date a daughter of a reputed drug dealer in a confidential FBI case at the same time he is trying to rebuild a relantionship with an old flame.
Mac and Joey try to find the responsibles for vandalizing elderly homes. The problem is that one of the prime suspects is the son of Fuller's girlfriend.
McCann infiltrates a group of devil worshipers whose leader has enthralled a teenage boy with her beauty.
Hoffs is charged in a civil suit for a man she has arrested for solicitation. At court, she has to confront the man and his representative, her boyfriend's vindictive ex-wife.
Mac goes undercover as a football player when a high school football star dies from an unexplained heart attack.
Fuller, Hoffs and Mac go undercover to investigate a gang of high school extortionists operating in a high school.
After seeing a teenager being murdered, Hoffs infiltrates the girl's street gang to find out who killed her.
Hoffs and Mac investigate a car theft ring near a high school, and the prime suspect is a pupil of Hoffs.
