Superbeast is a 1972 American horror film written and directed by George Schenck and starring Antoinette Bower, Craig Littler, Harry Lauter, Vic Díaz and Jose Romulo.

A doctor finds a jungle laboratory, complete with mad scientist and genetic engineering experiments.

Pathologist Dr. Alix Pardee (Antoinette Bower) finds out about the project, is captured and held captive.

After Dr. Alix Pardee examines the body, she becomes interested in his condition and decides to go to the Philippines to investigate.

When Alix mentions Victor to the Captain, he claims there's no other American on board, and when she goes to his room, someone else is residing there.

He explains that he's working on a serum that turns violent people normal, and that Diaz would supply him with the convicts he needed to do his genetic engineering experiments.

One night, she sneaks into the lab and takes a sample of the serum, and then recognizes one of the convicts locked up, though he never showed any signs of aggression.

Fleming then explains that when his test subjects relapse and become violent, they go into a metamorphosis that turns them into a primitive beast, yet with the same intelligence, hence the name “Superbeast”.