Ok, this just dawned on me. In Season 1 Episode 6, at 20 min. and 3 sec. in, we see a huge reactor and our band is getting ready for the big antenna. Notice the device. Is it a prop? Nope it a real Fusion furnace.
Made by a company called General Fusion. Compare that moment above with the documentary "Let there be Light", currently on Netflix.
Go to 33 min. 21 sec. Yes... its the real thing. So how did the series staff find this thing? I'll bet there's a story there!
So I'm watching this documentary and I say "hey, I've seen that before" then it hit me... Travelers. But now I really want to know how they found it, and talked them into letting a full crew in to shoot it!