Joe Alien fulfills a dream of coming to Earth to find that it's overrun by zombies. Finding an ally in young Parker, he attempts to save the world!Joe Alien fulfills a dream of coming to Earth to find that it's overrun by zombies. Finding an ally in young Parker, he attempts to save the world!Joe Alien fulfills a dream of coming to Earth to find that it's overrun by zombies. Finding an ally in young Parker, he attempts to save the world!