I've never seen an episode of Ancient Aliens either, and I don't even have a television or cable anymore. Maybe this will turn up on YouTube or as a BitTorrent afterwards as I too would like to see this one. Of course keeping in mind that it will be full of hyped gobbledygook as is History Channels normal mode anymore.
I don't know anything about Xenon save that it is a gas used in camera and strobe-light flash-tubes.
!! FOXTROT JULIET BRAVO !!