I have a Sirius question...
The Visitors came from teh 4th planet in the Sirius system.
On earth, Sirius is the brightest star in the sky next to our own (wich is not a bright white/blue star like Sirius... it's the closeness that makes our own Sun look so bright... I get that).
But since Sirius is a bright white/blue star, why the glasses? They said it was because they were not used to the bright light on earth... but wouldn't planets in the Sirius system be bathed in a good bit of light themselves?
I didn't say Spoiler. The episode already aired! Why are you here if you haven't seen it?