21 Jump Street - Season 4 (1989)

Penhall, Hoffs and Ioki investigate a priest in a Catholic university who is suspected of selling Salvadorian babies to finance an underground sanctuary movement.

Penhall and Hoffs go undercover in a rough school to solve a drive-by shooting.

Hanson and Penhall go into a high school to investigate an arsonist. They meet a student who claims to have premonitions of the crimes, and the entire Jump Street unit becomes drawn to the idea of the supernatural.

After a series of burglaries in an upscale area Hanson goes into a school where he hooks up with a group of thrill-seeking kids, and Penhall and Ioki go into a private security firm.

Hanson and Hoffs investigate some med students suspected of stealing drugs from the hospital pharmacy.

Hanson and Penhall go undercover in a high school after a teacher and his wife are shot at in front of their home.

Captain Fuller, Penhall, Ioki and Hoffs infiltrate a group of bikers in an attempt to bring down criminal businessman Raymond Crane.

Fuller, Hoffs, Penhall & Ioki are staking out a suburban neighbourhood from a local home in hopes of stopping a string of burglaries. Hoffs is concerned about a neighbouring family.

An old case of Ioki's comes up and he tries to reconcile himself with the ultimate consequences of it.

Hanson, Hoffs and Ioki try to discover who is making synthetic heroin and experimenting on people with it. Also, Ioki tries to help a Chinese student deal with a spy trying to bring him home, and Hoffs fends off an unwanted suitor.

Captain Fuller & Hoffs investigate after a popular teacher, who is also an environmentalist, is stabbed to death.

Through Officer John Cogan of the Metropolitan Police of the future, we revisit significant moments for the Jump Street team members.

Ronnie Seebok is on death row. He asks Hanson to witness his execution.

Fuller, Hanson and Penhall investigate suspected drug use in a college athletic program after a student basketball player is killed in a high speed single car accident.

Hanson and Penhall investigate a school paper bombing and end up on a romantic mission.

Penhall and Hanson go to El Salvador to look for Marta.

Hanson and Penhall investigate a school of independent study after several office items are stolen.

Hoffs and Ioki go undercover at a university whose disabled students are being raped. Officer Scanlon, one of Fuller's previous officers who was disabled after being shot, works with Penhall on the same case.

Penhall infiltrates a neo-Nazi group while Hoffs and Ioki investigate a group that opposes them.

A reporter interviews the Jump Street team after a senator's school visit is cut short by a bomb threat. Each officer gives a different offbeat account of what happened.

While coaching little league, Penhall discovers a missing child and investigates.

Penhall is transferred to the 43rd Precinct and ends up working with dirty cops.

Hanson, Penhall and Hoffs go into a school to investigate a gang rape and are stuck there when there is a power blackout.