Conversation so far:
what does mahoney teach hightower to do in the movie 'policy academy'
Carey Mahoney was teaching Moses Hightower how to drive so he could pass the driving test.
Does Carey Mahoney appear in more movies?
Officer Mahoney is the lead character of the first four Police Academy movies and the cartoon of the series.

Question: How many movies are there in the series?
Self-contained rewrite: How many Police Academy movies are there?