Deep in the sewers beneath the city of Regent Park, another baby alligator feeds on the experimental animals discarded by Future Chemicals Corporation. Nourished by toxic growth hormones and other mutating chemicals, the gator grows immense in size, develops a voracious appetite and goes out on a killing spree. Nobody believes the sightings until a large number of people are killed, and the police eventually embark on a search-and-destroy mission to put a stop to the alligator's murderous rampage. They track it down to a lake and a police helicopter attempts to blow the alligator up, but to no avail. Afterwards, two officers enter a marsh area where the alligator had escaped to. One of the officers uses a rocket launcher and ends the alligator's reign of terror.
Joseph Bologna as David Hodges
Dee Wallace as Christine Hodges
Richard Lynch as Hawk Hawkins
Woody Brown as Rich Harmon
Holly Gagnier as Sheri Anderson
Bill Daily as Mayor Anderson
Steve Railsback as Vincent 'Vinnie' Brown
Brock Peters as Chief Speed
Trevor Eyster (credited as Tim Eyster) as J.J. Hodges
Voyo Goric as Carmen
The film has received negative reception, with some critics considering it a retread of the first film. In a review of the original film, Kim Newman of Empire noted that "Alligator II: The Mutation is less a sequel than a lackluster remake". Almar Haflidason of BBC Online wrote that the film lacked "the wit and indeed the scares of the original". The film currently holds a score of 3.2/10 on IMDb, based on 1,469 user reviews.