POLICE ACADEMY 4: CITIZENS ON PATROL

Commandant Eric Lassard decides the police force is overworked and understaffed, so he comes up with the idea of recruiting civilian volunteers to work side by side with his officers in a program called "Citizens On Patrol" (COP).

Carey Mahoney and his friends Moses Hightower, Larvell Jones, Eugene Tackleberry, Zed McGlunk, Carl Sweetchuck, Laverne Hooks, and Debbie Callahan are in charge of training the civilians. The civilians include the enormous Tommy "House" Conklin (who Hightower used to babysit), gung-ho senior citizen Lois Feldman, Tackleberry's own father-in-law Mr. Kirkland, and skateboarding delinquents Kyle Rumford and Arnie Lewis. The latter pair were caught by Captain Thaddeus Harris, and the judge was about to throw the book at them until Mahoney speaks to the judge to let Arnie and Kyle join the COP program as alternative punishment. The judge agrees, and the boys are joined by their attorney, Milt Butterworth.

Believing "the concept of citizens doing police work is asinine", Harris is determined to see the COP program fail and take over Lassard's job at the academy. When Lassard leaves on an overseas conference, Harris, and his right-hand man Lt. Carl Proctor, are put in charge of the academy and Harris immediately plots to make the COP volunteers quit and leave police work to officers.

The volunteers, however, do well in their training. Mrs. Feldman excels in firing Tackleberry's .44 Magnum, and they bond amicably (she reminds him of his mother). In training in water safety and drowning victim rescue, Zed rescues a cadet and gains a love interest, a reporter/photographer Laura, who has come to view Lassard's COP program and becomes attracted to Zed. Unfortunately, Harris ruins the moment, insulting them both and inspiring Zed to replace Harris' deodorant with mace, which burns his armpits. Despite pranks pulled on him during training, Harris is still determined to make the Citizens on Patrol program fail.

Jones learns that volunteers House, Kyle and Arnie feel ready to go out and arrest criminals, so he, Mahoney, Hightower, and Tackleberry prank the boys, locking them in a prisoner transport van with Hightower, who is posing as a Voodoo practitioner who reanimates Tackleberry's "dead" brother, as a Jason Voorhees-esque maniac with a chainsaw to make them take training more seriously. Later, after Harris yells at Zed again, calling him a disgrace, Laura comforts him, saying she thinks he is perfect.

After COP volunteers accidentally foil an undercover police sting, the program is suspended, much to Harris' delight. Mahoney believes he did it on purpose to shut down the COP program, paying him back by putting superglue on the mouthpiece of Harris' bullhorn, semi-permanently sticking the mouth guard to its rims. Sometime later, Harris gives some prominent citizens a tour of his precinct when Proctor is tricked into releasing every inmate at the precinct 19 jail, including a team of ninjas and Randall "Tex" Cobb. After the criminals imprison Harris and his guests, they escape into the street, only to run into Mrs. Feldman, who immediately informs the Lassard academy.

When Lassard's officers hear of the jailbreak, COP volunteers are dispatched with the regular officers to catch the escaped felons. After stopping a robbery, a ship hijacking and a high-speed air balloon chase, the criminals are all recaptured. Meanwhile, House, Kyle, Arnie, and Butterworth save Harris and Proctor from drowning in the river after their attempt (and failure) to participate in the chase, and Zed impresses his girlfriend Laura by saving Sweetchuck's life after they both fall out of a plane in mid-air. Several of the police chiefs who witness Lassard's program in action congratulate and compliment him on the program and his officers, much to Harris' dismay.

After prisoners escape and take hostages, the civilian recruits and officers work together to rescue the hostages and prove the value of the Citizens On Patrol program.

The film concludes with the unlikely team of civilians and officers pulling off a successful rescue, vindicating Commandant Lassard’s experimental program. This resolution underscores the franchise’s theme that even the most mismatched group can rise to the occasion when it matters. The ending’s light, triumphant tone fits the comedic stakes and gives both the rookies and their mentors a moment in the spotlight.