From Superman to Silver Surfer, some of our favorite super-powered heroes originate from beyond the stars, but every ray of light has its shadow. As often as interstellar visitors to Earth are here to help, they’re as often here to enslave us, infects us, and just plain wipe us Terrans out entirely. We talk about the way in which evil aliens have affected superhero stories and threatened our favorite heroes and we each spotlight our favorite nefarious neerdowell from another world.