A good alien from a dying race must impregnate an Earth woman to avoid extinction of his race. A bad alien whose race helped wipe out good alien's race doesn't want to see this happen. A good alien from a dying race must impregnate an Earth woman to avoid extinction of his race. A bad alien whose race helped wipe out good alien's race doesn't want to see this happen. A good alien from a dying race must impregnate an Earth woman to avoid extinction of his race. A bad alien whose race helped wipe out good alien's race doesn't want to see this happen. A good alien from a dying race must impregnate an Earth woman to avoid extinction of his race. A bad alien whose race helped wipe out good alien's race doesn't want to see this happen.