Lieutenant Frank Drebin discovers that his ex-girlfriend's new beau is involved in a plot to kidnap a scientist who advocates solar energy.
 
No review.  Just a quote from the movie. 
 
Lt. Frank Drebin: That's the red light district. I wonder why Savage is hanging out down there.
Captain Ed Hocken: Sex, Frank?
Lt. Frank Drebin: Uh... no, not right now, Ed. We've got work to do.
 
Nuff said.
 
FUN FACT:  "Weird Al" Yankovic had a brief role as a thug who holds the police at the precinct at gunpoint. In the scene, he says, "Okay, Pigs, say your prayers!" followed by an oblivious Frank slamming the door open and knocking Yankovic's character to the floor. Yankovic said it took more than twenty takes to get the scene done, and that after about sixteen takes, his leg had turned "a nice shade of purple." The stunt coordinator asked Yankovic at that point if he wanted to wear some padding. Yankovic also recalled that O.J. Simpson felt sorry for him.  'Weird Al' Yankovic appears in all three movies in the trilogy but this is the only one where he doesn't appear as himself.