Man Who Killed Hitler and then the Bigfoot

After assassinating the world's worst dictator, Calvin Barr tries to live his life in peace but finds himself being forced out of retirement by a completely different but equally dangerous threat. As the FBI is aware of his assassination of Adolf Hitler, they turn to him as the only one who can save humanity from Bigfoot. With the creature carrying a dangerous plague, Barr has to stop him before it's too late.