S4E1 - Draw the Line
Booker resigns from the police force after solving a case that gets Hanson out of prison.
Sept. 18, 1989, midnight
S4E2 - Say It Ain't So, Pete
Penhall gets caught up in the excitement as he and Hanson go undercover to bust a college gambling operation.
Sept. 25, 1989, midnight
S4E3 - Eternal Flame
Hanson meets an old flame now married to the owner of a 80's nightclub suspected of providing LSD to high school students.
Oct. 2, 1989, midnight
S4E4 - Come from the Shadows
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.
Oct. 9, 1989, midnight
S4E5 - God is a Bullet
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.
Oct. 16, 1989, midnight
S4E6 - Old Haunts in a New Age
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.
Oct. 30, 1989, midnight
S4E7 - Out of Control
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.
Nov. 6, 1989, midnight
S4E8 - Stand by Your Man
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.
Nov. 13, 1989, midnight
S4E9 - Mike's P.O.V.
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.
Nov. 20, 1989, midnight
S4E10 - Wheels and Deals (II)
Working on a tip from Booker, the Jump Street cops join a motorcycle caravan in order to bring Raymond Crane to justice.
The crossover starts on Booker S01E08 Deals and Wheels (I).
Nov. 27, 1989, midnight
S4E11 - Parental Guidance Suggested
While observing a family suspected of operating a burglary ring, Hoffs begins to suspect that a boy is being abused.
Dec. 4, 1989, midnight
S4E12 - Things We Said Today
Ioki is confronted by a teenage boy with a gun, who three years earlier Ioki had talked into turning in his drug abusing family.
Dec. 18, 1989, midnight
S4E13 - Research and Destroy
The Jump Street Cops are sent to investigate a college chemistry lab where it is suspected that new designer drugs are being manufactured.
Jan. 8, 1990, midnight
S4E14 - A Change of Heart
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.
Jan. 15, 1990, midnight
S4E15 - Back from the Future
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.
Jan. 29, 1990, midnight
S4E16 - 2245
Hanson tries to convince a juvenile inmate on death row to appear in a film intended to keep his peers out of prison.
Feb. 5, 1990, midnight
S4E17 - Hi Mom
Hanson and Penhall expose a point shaving scheme when they go undercover to investigate the drug related death of a college basketball star.
Feb. 12, 1990, midnight
S4E18 - Awomp-Bomp-Aloobomb, Aloop Bamboom
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.
Feb. 19, 1990, midnight
S4E19 - La Bizca
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.
Feb. 26, 1990, midnight
S4E20 - Last Chance High
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.
March 19, 1990, midnight
S4E21 - Unfinished Business
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.
April 9, 1990, midnight
S4E22 - Shirts and Skins
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.
April 30, 1990, midnight
S4E23 - How I Saved the Senator
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.
May 7, 1990, midnight
S4E24 - Rounding Third
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.
May 14, 1990, midnight
S4E25 - Everyday is Christmas
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.
May 21, 1990, midnight
S4E26 - Blackout
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.
June 18, 1990, midnight