In 'Jaws', what is the name of the police chief?

In 'Gladiator', what is the name of Russell Crowe's character? In 'Gladiator', who plays the emperor Commodus? In 'Braveheart', which Scottish hero does Mel Gibson play? In 'Titanic', what is the name of the necklace's giant blue diamond? In 'Jaws', who plays shark hunter Quint? In 'Close Encounters of the Third Kind', at which landmark do the aliens land? In 'Thelma & Louise', which actresses play the title characters? In 'The Sound of Music', what is the family's surname?