MonsterQuest has a brand new episode on tonight called “Killer Chimps in America.”

Here’s the official episode description:

Chimpanzees are known to us as amusing circus attractions and are even popular as pets, but when they attack the results are frightening and horrific. Just as disturbing, across the U.S., witness reports suggest that chimpanzees may be on the loose. In the 1920s and 30s, chimps were common in Florida as part of road side carnivals and zoos, but in some cases these animals were let loose or escaped. Today, not only are attacks from pet chimps on the rise, but witnesses in Florida describe encounters with what may be wild chimpanzees. Now, MonsterQuest trackers and primatologists investigate how vicious chimps can actually get, and whether the environment could sustain these primates by searching the swamps and wilderness for a population of wild chimps in America.

Please remember that MonsterQuest airs on Wednesday nights at 9pm EST on History Channel.