A police officer, John Kimble (Arnold Schwarzenegger), has the job of ensuring that a criminal named Crisp remains behind bars permanently. To accomplish this, he must locate Crisp’s son and former spouse. All Kimble knows initially is the name of a small Oregon town where they reside and that the boy attends kindergarten. In order to find the child, Kimble poses as a kindergarten teacher. Despite being a hardened law enforcement officer on a serious assignment, Kimble unexpectedly discovers he finds enjoyment in teaching the children. He also develops an attraction to another teacher, Joyce (Penelope Ann Miller), who is a single mother with a son in his class. It turns out that Joyce happens to be Crisp's ex-wife – quite convenient! However, Kimble must maintain composure because Crisp is on his way to retrieve his son. For the most part, Kindergarten Cop proves to be an enjoyable film. Schwarzenegger seems somewhat stiff around the kids, but this actually works well for the movie. His character should feel uncomfortable in a classroom setting. There are several funny moments that arise from the contrast between Kimble’s serious demeanor and the children's behavior – my favorite is his reaction to the child fixated on death. It was genuinely amusing. While Schwarzenegger appears awkward with the kids, the opposite seems true regarding his scenes with Miller; their chemistry together is apparent and enjoyable to watch. I would have liked to see them collaborate on more films. Another positive aspect of Kindergarten Cop comes from Pamela Reed’s portrayal of Kimble's partner. Reed consistently delivers strong performances, and this one is no exception. With some action sequences towards the end, Kindergarten Cop ultimately provides a pleasant viewing experience. I do have a couple of criticisms, though. The film feels too lengthy; I believe trimming approximately 10 to 15 minutes would improve its pacing and make it more concise. Scenes featuring Cathy Moriarty could be removed as they don’t contribute anything meaningful. Also, the villain Crisp and his mother aren't intimidating enough; they come across as comical. If portrayed with a greater sense of menace, their final confrontation would have been even stronger. Nevertheless, it remains a worthwhile film in its current form.

Source on TMDB