Hanson is suspected of killing a crooked cop who was responsible for Ioki's shooting. He goes on the run. Fuller gets Booker assigned to the cops's partner who might also be crooked, and Booker investigates the shooting.

Hanson, Hoffs and Ioki go undercover to try to solve a series of drive-by shootings between two gangs. Booker investigates the partner of a dirty cop

After the car of a bigoted and controversial college radio talk show host is bombed Hoffs and Booker investigate.

The team hits the streets to find a predator that is preying on young hustlers.

The team goes into a school of creative arts to investigate heavy drug dealing that will close the school if not it isn't stopped.

Hanson and Penhall go into a school on a narcotics case but get pulled out because one of the suspects is the mayor's son.

Booker goes undercover within a group of drug using and dealing teens, but when the gang suspects that one of their own is a narc, Booker begins to crack under the pressure.

Captain Fuller's friend Wilcox comes to him for help finding an army private that has gone A.W.O.L. before the private gets in serious trouble.

Hanson's friend Russell Buckins jeopardizes the Jump Street program when he writes about it for a magazine article.

Penhall investigates a group of nerd students that break into the school computer to change grades. Since he's blending in with the nerds, he's being bullied. The team exchanges bully stories.

The team tries to solve a flasher case. Hoffs experiences some fallout at work after a romantic entanglement goes awry.

Hanson, Penhall, Ioki and Booker go into a juvenile detention centre to solve a murder.

Rejecting the city's contract renewal offer The Association of Municipal Police Officers goes on strike. As management, Captain Fuller must continue to work. Hanson observes the union negotiation and the rest of the team strikes.

Ioki goes undercover in a Vietnamese gang that extorts the Vietnamese community.

Investigating a rape on a college campus, Hanson, Ioki and Booker go undercover in two fraternities. Hoffs goes undercover in a sorority and Penhall in a dorm.

Hoffs goes undercover at a school that has a clinic that gives teens information about birth control. Ioki works undercover within a group protesting the clinic's presence on campus. Booker sets up Sal on a date.

Penhall and Booker investigate a football coach after a student is paralyzed in a game.

Penhall works a Major Crimes case with his new partner Fitzgerald. The case involves allegations of child abuse against a public figure.

The team works a case involving drug dealers while keeping an eye on The Rangers, a group of civilians that patrol the street to prevent and solve crime.

Minus Penhall, the team returns to 21 Jump Street after the summer. Working with Booker, a new officer, Hanson investigates a vandalization incident that appears to be a hate crime.