Dr. Henry Monroe is a sadistic man who hunts people down harvest their organs and use them to extend his life. As far as anyone can see Monroe is immortal he can survive having his heart ripped out or a gunshot to the head as long as he replaces the organ he has damaged. He use to only hunt humans but when he discovered he killed a mutant and it’s organs gave him power he decided to hunt super-humans and attempting to kill aliens to see he their organs will work as well. There were many times he was believed dead only to come back. Last time people thought he was dead Nobody accidentally knocked him off a cliff, but he was seen again a few months later.