Hanson becomes an inmate in a juvenile detention hall in order to investigate the murder of one of the inmates.

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.

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.

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.

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 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.

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.

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. His first case involves catching drug dealers.

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.

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.

While observing a family suspected of operating a burglary ring, Hoffs begins to suspect that a boy is being abused.

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.

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.

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 tries to convince a juvenile inmate on death row to appear in a film intended to keep his peers out of prison.

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. His first case involves catching drug dealers.

Hanson and Penhall infiltrate an exclusive preppie clique to investigate a prank that left a girl dead.

Booker goes undercover as a radio DJ to discover who killed a controversial college radio personality by planting a bomb in his car.

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.

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.

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 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.

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.

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.

Doug falls for a narcotics officer with questionable tactics and a possible drug problem herself.

Hanson and a film star he had been assigned to protect are kidnapped by an escaped murderer.

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.

Hanson blames himself for failing to prevent the shooting death of his girlfriend in a convenience store robbery and becomes obsessed with revenge.

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.

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.

A popular sports writer finds his whole life ruined when Penhall believes his ex-wife's allegations of his being a child molester.

Working on a tip from Booker, the Jump Street cops join a motorcycle caravan in order to bring Raymond Crane to justice. The crossover starts on Booker S01E08 Deals and Wheels (I).

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.

Ioki is confronted by a teenage boy with a gun, who three years earlier Ioki had talked into turning in his drug abusing family.

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.

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 goes after an old friend who wrote an article exposing the Jump Street program causing Hanson to get suspended from duty.

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 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.

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 finding the missing daughter of a famous reporter, Mac tries to solve the mistery behind the missing.

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.

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.

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.

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 and Joey enroll in a college where good students are mysteriously being turned into criminals.

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.

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.

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.

After discovering that some white officers are responsible for beating and harassing black teenagers, Hoffs, with Fuller's help, try to convict them.

Mac goes undercover as a football player when a high school football star dies from an unexplained heart attack.

After seeing a teenager being murdered, Hoffs infiltrates the girl's street gang to find out who killed her.

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.

Past romances that didn't have happy endings are the subject of conversation at a Valentine Day Eve poker game.

Penhall gets caught up in the excitement as he and Hanson go undercover to bust a college gambling operation.

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.

Fuller, Hoffs and Mac go undercover to investigate a gang of high school extortionists operating in a high school.

Hoffs, Joey and Mac help a raped girl that has no proof to convict the attacker.

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.

Racial violence threatens to break out at an integrated school when word leaks out that a white student got a black student pregnant.

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.

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.