Alligator is a film based on a modern myth. Modern myths are a very popular cult species: there are films about flying saucers, about the Loch Ness monster, Bermuda Triangle, all that sort of thing, although as yet there hasn’t been a movie about ‘the poodle in the microwave’. Here, John Sayles and Lewis Teague offer us the oft-told story of the pet baby alligator flushed down the toilet, which takes up residence in the sewer and grows to be 100 feet long.