From The Art and Popular Culture Encyclopedia
Alligator is a 1980 comedy horror film film, directed by Lewis Teague with a screenplay by John Sayles. It stars Robert Forster, Robin Riker, and Michael V. Gazzo. It follows the attempts of a police officer named David Madison and a reptile expert named Marisa Kendall to stop a deadly giant alligator that is killing humans in the sewers of Chicago.
The film received praise from critics for its intentional humor and, in 1991, an apparent sequel was released, titled Alligator II: The Mutation. Despite the title, this film shared no characters or actors with the original, and the plot was essentially a retread of the first film.