Season 4

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. The crossover starts on Booker S01E08 Deals and Wheels (I).

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.