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

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

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.

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 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.

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.

Hanson goes undercover as a punk rocker in an effort to stop a feud between two rival gangs from turning into a war.

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

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.

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

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.

Hoffs enrolls in a teen modeling school after several of its graduates end up appearing in pornography.

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.

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.

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.

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).

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.

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.

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

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.