All in all, there were three Naked Gun movies.
Naked Gun: From the Files of the Police Squad! was released in 1988,
Naked Gun 2.5: The Smell of Fear in 1991, and
Naked Gun 33.3: The Final Insult in 1994. There
has been talk of a 4th movie as well, but as of 2014, it
was still an idea on paper.
All of these movies were basically a satirical look at
the life of Lt. Frank Dreben (Leslie Nielsen) as an L.A.
cop, and were initially based on a short-lived TV series
called Police Squad!. Focusing on the first
movie released in 1988, it was, overall, a hit with
critics, and it did very well at the box office.
The movie also starred Priscilla Presley as Jane
Spencer, Ricardo Montalban as Vincent Ludwig, and even
O.J. Simpson as Detective Nordberg.
The film begins with a
number of high-profile terrorists plotting the demise of
the West, only to be defeated by an undercover Frank
Dreben. Back in the states, Frank is put in charge
of the Queen's security as her visit to the USA is nigh.
Some of the terrorists that were present at the
beginning of the movie, including Pahpshmir (yes, that
is correct), plan to assassinate the Queen with the help
of a drug pin named Ludwig (Montalban). In the
end, Frank does manage to save the Queen, stop all the
baddies, and win the girl.