 On the Moon , Paxton watches footage of Colonel Phillip Green ( " The Savage Curtain " ) . Greaves enters and updates Paxton on the status of the child , and Paxton injects himself in the neck with an unknown substance . Phlox then reports that Khouri 's body contained traces of a substance used in a zero @-@ gravity mining facility . T 'Pol and Tucker volunteer for an away mission to the Moon . Disguised as miners , they are quickly detained after Brooks apparently leaks details of the mission . Paxton reveals that the entire complex is a warp capable ship , and the vessel travels to Mars where it takes control of the <unk> array , which normally protects the Earth from comets . He uses the array to fire a warning shot and issue an ultimatum — that all non @-@ humans must immediately leave Earth . 
