Wow, I knew about the Moon Museum segment because Jade Dellinger emailed about it. But I didn't know the first episode of this season's History Detectives also included a whole segment on satelloons and Project Echo. I love how they search for satelloons online--and then crop out the top few search results.
I guess if the Detectives suddenly discover an undocumented Richard Neutra house in Utah, I'll have to start making some calls. Meanwhile, watch History Detectives on your local PBS station! I'm sure you'll like it! [thanks cliff for the heads up]