Character mistake: When Polly answers the phone and is told of the log drifting in the channel, she immediately yells to Sean and tells him this. However, she does not leave enough time for the caller to be able to tell her all this, she leaves 1-2 seconds before passing it on to Sean.
Jaws 4 (1987)
1 character mistake - chronological order
Directed by: Joseph Sargent
Starring: Michael Caine, Mario Van Peebles, Lorraine Gary, Lance Guest
Factual error: Sharks cannot "stand" up on the surface of the water like this one does in the end. (01:11:15)
Michael Brody: I've always wanted to make love to an angry welder. I've dreamed of nothing else since I was a small boy.
Trivia: In the third film Michael Brody did a whole lot of welding and dated a marine biologist. In this film he is studying to be a marine biologist and his wife does a lot of welding.
Question: Did this movie have any negative impact on director Joseph Sargent's life or career?
Answer: Not really, he went on to direct many films and TV shows/miniseries, earning some Primetime Emmys and Director's Guild Awards in the process.