[4] Detective Frank Drebin (Leslie Nielsen) tries to uncover a plot to assassinate Queen Elizabeth II, who is on a state visit to the USA.

The main suspect is Vincent Ludwig, a rich businessman (Ricardo Montalbán), who uses a hypnotic device to turn others into murderers.

Frank discovers that Jane's new boyfriend, Quentin Hapsburg (Robert Goulet), is involved in an evil plan to kidnap Dr. Albert S. Meinheimer (Richard Griffiths), a scientist whom President George H. W. Bush (John Roarke) has chosen to determine a new national energy policy.

Outside they are escorted by Dillon's gangster mother (Kathleen Freeman) to his country retreat, where Frank also meets Rocco's voluptuous moll (Anna Nicole Smith).

In 2009, it was revealed that a fourth movie starring Leslie Nielsen was coming out as a direct-to-TV sequel, and that it was going to be about Frank training a young rookie.

[5][6][7] In December 2013, Paramount Pictures announced that a reboot of The Naked Gun franchise was in development with Ed Helms cast in the role of Frank Drebin, while the script was being co-written by Thomas Lennon and R. Ben Garant.

[8] By January 2014, Garant revealed that the working title of the project is "Episode IV: A New Hope", while announcing that it is intended to be a sequel to the original films.

[9] In March 2015, David Zucker stated that he was offered a producing role on the project, but had denied being involved as he felt like it would differ in comedic style and ultimately be inferior to his original films.

[10][11] In August 2015, Helms confirmed that the script was still being written, while acknowledging the concerns that Zucker had with modern-day audience reception, and a need for something other than the spoof genre of the previous movies.

[12] By March 2017, a re-write of the script was being completed by David Zucker and Pat Proft, with the plot being reworked to feature the son of Frank Drebin.

[14][15] In June of the same year, Neeson stated that MacFarlane was working on a new draft of the script, with the studio additionally negotiating the filmmaker's potential role as director.

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