Alligator

Twelve years ago, the Kendall family's pet alligator was set free in the Chicago sewers, where it fed on the bodies of dogs used in genetic experiments. Now, the giant mutated reptile is on a feeding spree, killing everyone in its path. Cop David Madison (Robert Forster) descends into the sewers on the alligator's trail, with the help of a reptile expert (Robin Riker). Henry Silva co-stars in this tongue-in-cheek cult hit scripted by John Sayles.