Station: Michael checks the new corpse and makes a disturbing observation. There's no bleeding. It's blood has already dried. Which means it couldn't have been alive when it came through the door. There's only two possible explanitions you can have. Either it was post mortem reflexes that made the body move, which sounds far-fetched since it was actually walking! Or it was a zombie or such, which is almost impossible for a scientific mind like you to accept.
Greed: The creature still stands against the Greed, facing it only inch away from the hull. It doesn't even turn it's head while conversing with you: "We shall never become slaves to the Areq'dah, you will..." Suddenly it emits a loud screetch and falls silent, there comes a puff of smoke from it's knee-joint. You know well the name Areq'dah, they are the ones who destroyed Earth. But the Areq'dah empire fell to their own civil war. They are all but extinct now.