Hoffs and Garrett go undercover in a massage parlor believed to be the front for a drug ring, meanwhile they deal with a DEA officer.
Garrett starts dating the sister of a suspected high school drug ring leader.
McCann joins Jump Street and is partnered with a mentally-handicapped teen in a school buddy system to investigate the death of his former partner.
Penhall falls for his narcotics partner who seems to have a drug problem of her own.
While working undercover in a high school, Hoffs is suspended by Jump Street after failing a drug test. While Penhall investigates a drug ring at a high school, he becomes suspicious why a star basketball player refuses to take part in the schools anti-drug program.
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 and Joey join a wilderness camp for troubled teens to investigate a possible murder, but are constantly harassed by the leader, an ex-Marine.
McCann investigates a murder of a high school football star and dates a cheerleader who has AIDS.
Doug and Joey enroll in a college where good students are becoming criminals.
Doug's life enters limbo while doctors struggle to save him after being shot and makes life-altering career choices after talking with those he meets there.
Hoffs and Fuller investigate white police officers who are believed to be beating black teens.
Hoffs, Joey and Mac try to find evidence that a girl was attacted and raped.
Joey takes responsibility for a baby girl while trying to find her drug addicted mother.
Mac tries to solve the mystery of why a famous reporters 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 robberies at an old age home with one suspect being the son of Fullers girlfriend.
Mac enters a devil worship cult who's 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 a schools star dies from a heart attack.
A group of high school extortionists has Hoffs, Mac and Fuller going in undercover to investigate.
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 students.