the aliens of the flat underworld

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Across
  1. 2. The real shape of the earth
  2. 5. The shape everyone thinks the earth is
  3. 6. This is where the aliens are at base
  4. 7. 51 The place where the aliens escape from
Down
  1. 1. The creatures who will take over the world in 2089.
  2. 3. The hero that will try to defeat the aliens
  3. 4. The space vehicle that will intake all humans in 2089
  4. 5. The alien on a adult cartoon show who is really here to take over earth