Alligator (Also Known As: Aligator ) is a Horror Sci-Fi film directed by Lewis Teague and written by John Sayles (screenplay), John Sayles (story. It released on 2 July 1980 (USA). The film stars Robert Forster, Robin Riker, Michael V. Gazzo. A baby alligator is flushed down a Chicago toilet and survives by eating discarded laboratory rats injected with growth hormones. The small reptile grows gigantic, escapes the city sewers, and goes on a rampage.