Elizabeth accompanies Timus in trying to negotiate a peaceful settlement to the galactic Sorson-Thargon war, but both warring factions well know the Galactic Federation as a bunch of do-nothings. As it so happens, the Sorsons arrive to establish a base on Earth's moon, with the Thargons close behind to blow them into space dust. America sends a space shuttle out to meet the lunar visitors, which gets caught up in a space battle and destroyed (with the Tomorrow People jaunting the pilots out in time). The Thargons, their immanent demise at hand, trap Mike in a forcefield to use as a human shield.
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Well, we're on our way. Gosh, I wonder what we're gonna say when we meet 'em. I mean, what do you say to an alien? "Take me to your leader?"
"Dr. Livingston, I presume."
Yeah. Maybe just... "Howdy, neighbor."