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Hoffs is assigned to look after a Polish exchange student who comes to town and begins to act out, partly due to her repressive upbringing in her native country and partly due to stereotypes about American high schools perpetuated through TV. Hanson goes undercover at a high school mechanic shop to investigate a car theft ring.

Hanson goes undercover to investigate a series of burglaries at a local high school and learns that both the burglar and a student are obsessed with one of the teachers who works there, Miss Chadwick.

The entire Jump Street gang investigates the rape and murder of a 16-year-old girl by going undercover in a private school, where much of the student body are kids from affluent families.

Officer Hoffs is sent to a Catholic school for girls to investigate a possible arsonist with all leads pointing to a very unlikely suspect. Meanwhile, Penhall is mugged by his date at a bowling alley.

While still mourning the loss of Captain Jenko in a drunk driving crash, Hanson and Hoffs are assigned to get close to a high school principal after he receives death threats from a gang leader that he stood up to. He is taken hostage along with the 300 students at the school and it's up to Hanson, Hoffs, Ioki, and Penhall to save them with the help of their new captain.

Note: First appearance of Steven Williams (Captain Adam Fuller).

While busting drug dealers, Hanson and Penhall (in their "McQuaid brothers" cover) discover a girl who is being sexually abused by her father, a high-ranking police officer. She seeks out Hanson's help to carry out a hit on her father.

The son of a loan shark continues the family tradition, starting up his own cash-loan operation in a local high school and physically assaulting students and teachers who do not repay their debt on time.

Hoffs befriends a promising young high school baseball player from New York City who is in the federal witness protection program. Penhall pretends to be a baseball player to get closer to the young man and help protect him when his mobster father becomes a government witness.

Officers Ioki and Hoffs go undercover in a teen modeling agency that is suspected to be a front for a pornography ring that exploits minors. Meanwhile, Captain Fuller comes across a down-and-out woman he previously arrested and sets his sights on the modeling academy's owner, in an effort to find those responsible for coercing the girls into making these films and bring them to justice.

In the season one finale, Hanson goes "punk" to infiltrate suburban rival gangs in an attempt to halt their destruction and rescue one member caught between academics and anarchy.

The Jump Street team investigates whether a relative is responsible for a child's kidnapping.

A 16-year-old crack dealer is mysteriously murdered and the Jump Street squad goes undercover in the seedy world of narcotics and prostitution.

Officer Penhall suspects that a hired outside police expert is responsible for the wave of crack-related deaths.

The Jump Street squad puts a sting on a bar serving alcohol to underage kids and ironically discovers that their own captain has been arrested for drunk driving.

Ioki faces a paternity suit and jail when a teen fingers him as the father of her child. Fuller has Hoffs and Penhall go undercover to find the truth and clear Ioki's name.

As Burgard High students and faculty sit on a powder keg of racial tension, Officers Hanson and Hoffs go undercover to defuse the potentially explosive situation in the racially divided high school.

Tyrell "Waxer" Thompson, the drug dealer busted by Officer Hanson in his first Jump Street case, escapes state custody while being transported to an adult prison. After discovering that Hanson is working undercover to protect a Hollywood heartthrob in town filming a movie, Waxer looks to settle the score.

Officer Ioki may not be who he claims, as he is faced with immediate dismissal from the chapel when it's discovered that he is not Japanese, but is, in fact, a Vietnamese refugee. The team learns about Ioki's past and how he came to America.

Officer Hanson experiences a late teenage rebellion, putting his friendships—and his career—in jeopardy.

To pacify their dateless state on Valentine's Day, the Jump Street squad plays poker and reminisces about their worst dates, while Hanson recollects on his prom night when his father was killed.

Following up on his first Jump Street case, Hanson goes undercover and is trapped inside an in-patient adolescent drug treatment center while investigating reports that the center is mistreating patients.

Officers Hanson and Penhall pose once again as the battling McQuaid brothers to infiltrate a gang of students being bussed from the wrong side of the tracks. A teenager is mentally and physically abused by his father.

Penhall is forced to recount painful memories of his mother's suicide when a youth he's investigating takes his own life.

Hanson comes to blows with a new partner, Officer Dennis Booker, whom he suspects is as bigoted as the gang of racists they're about to bust.

Note: First appearance of Richard Grieco (Officer Dennis Booker).

While Hanson and Booker try to catch a drug dealer, their investigation is impeded by a gang of young vigilantes known as The Rangers committed to help clean the streets of crime and violence.

Penhall almost wrings a confession from an alleged child molester, only to learn that his accuser—his soon-to-be ex-wife— recanted and admitted to lying to the police in order to retain sole custody of the couple's daughter. In order to atone for his overzealousness, Penhall must now help the one he was so eager to bust deal with the devastation of a false charge.

Officers Penhall and Booker join an all-state football team to investigate possible criminal negligence on the part of the coach when his star linebacker is paralyzed for life.

Officers Hanson, Ioki, and Booker infiltrate two college fraternities in order to investigate a rape on campus. Hoffs goes undercover in a sorority and Penhall in a dorm.

Officer Ioki infiltrates a Vietnamese gang to break up an extortion ring victimizing the local Vietnamese community, and is offered a chance to contact his grandmother, whom Ioki left behind in Vietnam after the war.

When the Association of Municipal Police Officers calls for a strike, the Jump Street cops are torn over whether or not to cross the picket line. As management, Captain Fuller must continue to work. Hanson observes the union negotiations and the rest of the team chooses to strike.

The Jump Street cops try to solve a serial flasher case. Hoffs learns that her new lover is married and when she tries to break off the relationship, he harasses her until she reluctantly goes to Fuller.

While trying to infiltrate a high school computer club, Penhall is picked on by a bully, prompting each of the Jump Street cops to recall stories about having been terrorized by a bully at some point in their childhood.

When Russell Buckins pens a dangerously revealing magazine article about the Jump Street program, Officer Hanson is suspended and goes gunning for his old friend.

Penhall and Hanson are deputized into the U.S. Army's Criminal Investigation Division. Their assignment: Find a young Army private who went AWOL and get him back to his assigned unit before the Army prepares charges against him for desertion.

When the Jump Street cops are on the verge of busting the mayor's son for drug dealing, the mayor steps in and suspends Captain Fuller.

When drug-dealing gets out of hand at a prestigious performing arts school, the Jump Street cops must join the act.

The Jump Street cops go undercover on the streets as homeless runaways to find a missing teenager and the predator who is preying on young street hustlers.

When the controversial and bigoted host of a college radio talk show is nearly killed in an explosion, Booker takes over the show in an attempt to flush out the guilty party.

Officer Booker solves the case that clears Hanson and gets him released from prison, then resigns from the police force.

Note: This episode marks the departure of series regular Richard Grieco, who would go on to star in the spin-off series Booker.

Officer Penhall works as a bouncer at a sports bar while Hanson goes undercover to bust up a college gambling operation. The officers study for the Detective exam.

The owner of an 80s nightclub suspected of providing LSD to high school students is the husband of an old flame of Hanson's.

Officers Penhall, Hoffs, and Ioki investigate a priest in a Catholic university suspected of selling Salvadorean babies to finance an underground sanctuary movement. Penhall falls for an illegal immigrant from El Salvador suspected of working with the priest. When she is caught by the INS, he offers to marry her.

Hanson goes into a high school to investigate a series of burglaries in an upscale community and hooks up with a group of thrill-seeking teens. Penhall and Ioki work as rent-a-cops.

The death of a lesbian professor finds Hoffs and Fuller going undercover at a university. A student teacher's assistant develops romantic feelings for Fuller.

Hanson is invited to witness the execution of Ronnie Seebook, who is on death row for murdering a convenience store clerk, and asks the condemned inmate to make a film to scare off children from becoming criminals.

Hanson and Penhall investigate the drug related death of a basketball star and stumble into a point shaving scheme.

Hanson and Penhall go to El Salvador to look for Doug's missing wife and find themselves in the middle of political turmoil. They return home with Marta's nephew to be raised by Penhall.

Guest star: Richard Roundtree.

A handicapped policewoman is sent in undercover to investigate a series of attacks on handicapped women and Hoffs is sent in by Fuller undercover, in a wheelchair.

The officers tell their version of the story of how they saved a Senator from an assassin, each story with them as the hero. This was the last episode of season 4 that Johnny Depp was filmed in.

After Penhall abandons Ioki on a stake-out for a personal emergency, he is reassigned to uniformed patrol. At his new precinct, Penhall becomes involved with a group of corrupt officers while befriending rookie cop Dean Garrett–whom the other officers accuse of being a plant for Internal Affairs.

Note: This episode marks the final appearance of Dustin Nguyen on the series. First recurring appearance of David Barry Gray (Dean Garrett).

After the power goes out during a storm, Penhall, Hanson and Hoffs find themselves at the mercy of a violent gang in school.

Note: This episode marks the final appearance of Johnny Depp on the series. This is the final episode of the series to air on Fox.

In his first Jump Street assignment, Dean Garrett goes undercover with Hoffs in a massage parlor believed to be the front for a drug ring. Garrett takes an interest to a worker in the parlor, who turns out to be an undercover DEA officer.

Notes: First recurring appearance of Alexandra Powers (Kati Rocky). This was the first episode to air in first-run syndication.

Former DEA agent Kati Rocky has joined the Jump Street program, and partners with Garrett to investigate a recurrence of drug dealing at a school recently busted by the other officers. Garrett's estranged brother makes an unannounced visit, and Garrett discloses he was adopted while Rocky confesses to having dropped out of high school. Meanwhile, Detective Hoffs purchases her first home.

Notes: Final recurring appearances of Sal Jenco, David Barry Gray, and Alexandra Powers. This episode was originally produced for Season 4. Departed cast members Johnny Depp and Dustin Nguyen are featured in the opening sequence.

Officer Tony McCann joins Jump Street and is partnered with a mentally-impaired teen in a school buddy system to investigate the death of the teen's former buddy.

Doug's younger brother Joey joins Jump Street. After being rejected by Doug, he volunteers to go undercover in a cult and soon becomes brainwashed by their leader and a pretty girl who shows him love.

Doug's life enters limbo while doctors struggle to save him after being shot. He begins to make life-altering career choices after talking with those he meets there.

Mac tries to solve the mystery of why a famous reporter's daughter had been missing.

Mac goes undercover for the FBI by dating the daughter of a notorious drug dealer while trying to rekindle a romance with an old flame.

Mac and Joey try to find who is responsible for a series of robberies at a retirement home with one suspect being the son of Fuller's girlfriend.

Note: This episode marks the final appearance of Michael DeLuise in the series.

Absent: Holly Robinson.

Mac enters a devil worship cult whose leader can lure boys to join them with her beauty.

Hoffs is brought to court after being charged with a civil suit for arresting a man for solicitation.

Mac goes undercover as a football player after the school's star player dies from a heart attack. He uncovers toxic waste being dumped along a stream which runs under the football field–and that a teammate's father may be responsible.

Hoffs infiltrates a girl gang to find who is responsible for a murder of a teen she witnessed.

Hoffs and Mac investigate a car theft ring with the prime suspect being one of Hoffs' own students.

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