Hanson gets assigned to the Jump Street unit, a special division of the police force which uses young cops to go undercover and stop juvenile crime, when his youthful appearance causes him to be underestimated while on patrol. His first case involves catching drug dealers.

Hanson gets assigned to the Jump Street unit, a special division of the police force which uses young cops to go undercover and stop juvenile crime, when his youthful appearance causes him to be underestimated while on patrol. His first case involves catching drug dealers.

Jenko is killed by a drunk driver and is replaced by Captain Fuller who has his hands full dealing with a vengeful gang leader whom has taken his principal and several others hostage, including an undercover Hanson.

Hanson and Penhall try to locate some missing juveniles while Ioki tries to find a link between a teenage prostitution ring and a series of burglaries.

The Jump Street unit discovers that a boy who was being used as a pawn by his feuding parents faked his kidnapping with the aid of his grandfather to get away from his parents.

Racial violence threatens to break out at an integrated school when word leaks out that a white student got a black student pregnant.

Hanson and a film star he had been assigned to protect are kidnapped by an escaped murderer.

Ioki faces being dismissed from the force when internal affairs discovers that he is a Vietnamese refuge who is using an alias. Flashback sequences show his escape from Saigon.

Hoffs and Penhall must deal with a pursuing husband when they are assigned to escort a girl arrested for killing her father when he tried to prevent her from eloping.

Hanson goes undercover to find a student who is blowing up toilets. Meanwhile, Fuller must convince the higher-ups that the Jump Street program, which is scheduled to be deactivated over the summer, should be reactivated in the fall, and Doug decides it's time to grow up.

Booker resigns from the police force after solving a case that gets Hanson out of prison.

Hanson tries to convince a juvenile inmate on death row to appear in a film intended to keep his peers out of prison.

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.