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.
Hoffs goes undercover to keep a wild Eastern Bloc exchange student out of trouble. Hanson and Penhall enroll in a shop class suspected of being a chop shop for an auto theft ring.
A woman with car trouble whom Hanson helps out and makes a date with turns out to be a teacher who has been getting threatening messages and whose class he has been assigned to undercover.
Hanson and Penhall infiltrate an exclusive preppie clique to investigate a prank that left a girl dead.
Hoffs is not convinced that the captured suspect in an arson case at a Catholic girls school is the guilty party and believes that the real culprit will strike again at the school's prom.
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 daughter of a policeman who claims her father is sexually abusing her tries to hire Hanson-- undercover with Penhall as one of the drug dealing McQuaid brothers-- to kill her father.
Hanson who is out to catch a loan shark finds his cover threatened when his high school quiz team makes it to the semi finals which are to be broadcast on TV.
Penhall joins the school baseball team in order to keep an eye on one of its star players, whose life has been threatened when his father agrees to testify against the mob.
Hoffs enrolls in a teen modeling school after several of its graduates end up appearing in pornography.
Hanson goes undercover as a punk rocker in an effort to stop a feud between two rival gangs from turning into a war.
