第 4 季 共 26 集
播出时间：1989年9月19日
第 1 集 Draw the Line
播出时间：1989年9月19日
Booker resigns from the police force after solving a case that gets Hanson out of prison.
第 2 集 Say It Ain't So, Pete
播出时间：1989年9月26日
Penhall gets caught up in the excitement as he and Hanson go undercover to bust a college gambling operation.
第 3 集 Eternal Flame
播出时间：1989年10月3日
Hanson meets an old flame now married to the owner of a 80's nightclub suspected of providing LSD to high school students.
第 4 集 Come from the Shadows
播出时间：1989年10月10日
Penhall finds himself falling for an illegal immigrant from El Salvador when the Jump Street unit is sent in to investigate a priest suspected of selling babies.
第 5 集 God is a Bullet
播出时间：1989年10月17日
The Jump Street team intervenes when a tough new principal goes too far in his attempts to clean up a drug and crime infested inner city school.
第 6 集 Old Haunts in a New Age
播出时间：1989年10月31日
During a Halloween string of high school fires, Hanson becomes a bit skeptical of a teen age psychic claiming to be able to predict where the next fire will occur.
第 7 集 Out of Control
播出时间：1989年11月7日
Penhall and Ioki become rent a cops while Hanson becomes a member of a clique of thrill seeking kids who break into houses to annoy the rent a cops.
第 8 集 Stand by Your Man
播出时间：1989年11月14日
While trying to expose a drug ring at a prestigious medical school, Hoffs is raped while on a date with one of the suspects who later claims that she seduced him.
第 9 集 Mike's P.O.V.
播出时间：1989年11月21日
Hanson and Penhall investigate the murder of a high school teacher's wife and discover that the teacher hired one of his students to kill her.
第 10 集 Wheels and Deals (2)
播出时间：1989年11月28日
Working on a tip from Booker, the Jump Street cops join a motorcycle caravan in order to bring Raymond Crane to justice.
第 11 集 Parental Guidance Suggested
播出时间：1989年12月5日
While observing a family suspected of operating a burglary ring, Hoffs begins to suspect that a boy is being abused.
第 12 集 Things We Said Today
播出时间：1989年12月19日
Ioki is confronted by a teenage boy with a gun, who three years earlier Ioki had talked into turning in his drug abusing family.
第 13 集 Research and Destroy
播出时间：1990年1月9日
The Jump Street Cops are sent to investigate a college chemistry lab where it is suspected that new designer drugs are being manufactured.
第 14 集 A Change of Heart
播出时间：1990年1月16日
A lesbian student makes a pass at Hoffs when she and Capt. Fuller go undercover at a high school to learn the identity of a student who was a witness to a teacher's murder.
第 15 集 Back from the Future
播出时间：1990年1月30日
In the 21st century a young cop hoping to revive the Jump Street program interviews the retired officers who were there when it all started.
第 16 集 2245
播出时间：1990年2月6日
Hanson tries to convince a juvenile inmate on death row to appear in a film intended to keep his peers out of prison.
第 17 集 Hi Mom
播出时间：1990年2月13日
Hanson and Penhall expose a point shaving scheme when they go undercover to investigate the drug related death of a college basketball star.
第 18 集 Awomp-Bomp-Aloobomb, Aloop Bamboom
播出时间：1990年2月20日
Hanson and Penhall find a way to get out of the cold while remaining on the job as they trail a suspected bomber to Florida during spring break.
第 19 集 La Bizca
播出时间：1990年2月27日
Penhall ends up taking his nephew back to America after he and Hanson travel to El Salvador in order to find Penhall's wife, whom they learn was killed in the fighting.
第 20 集 Last Chance High
播出时间：1990年3月20日
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.
第 21 集 Unfinished Business
播出时间：1990年4月10日
A handicapped policewoman asks Fuller to send her undercover to investigate a series of attacks on handicapped women; however, Fuller also send in Hoffs in a wheelchair.
第 22 集 Shirts and Skins
播出时间：1990年5月1日
When the leader of a neo-Nazi group is murdered, Hoffs & Ioki go undercover in the liberal group suspected of the killing. While Penhall joins the Nazis to learn if they plan a violent reprisal.
第 23 集 How I Saved the Senator
播出时间：1990年5月8日
The Jump Street cops each relate a different version (with the teller as the hero of a film from their favorite genre), to a reporter investigating the foiled attempt to kill a senator.
第 24 集 Rounding Third
播出时间：1990年5月15日
After volunteering to become a Little League coach Penhall learns that one of the players was kidnapped by his father, from his mother and step-father.
第 25 集 Everyday is Christmas
播出时间：1990年5月22日
After botching an assignment, Penhall is transferred to a different precinct where he learns the cops routinely accept bribes and finds himself the subject of a Jump Street investigation.
第 26 集 Blackout
播出时间：1990年6月19日
Hoffs, Hanson and Penhall find themselves at the mercy of a defiant gang when all of them become trapped inside a school with out power.
