Joni Mitchell - Both Sides Now

Other than Peter Hale, Liam, as Scott's progeny (or whatever the appropriate werewolf word would be) is Scott's closest supernatural connection. Bloodlines n' shit.

Toph HAS to show up. They wouldn't have mentioned her "walking the earth" if she wasn't going to. Conservation of detail.

Was no one else a little weirded out when Asami referred to a Satomobile as a "Jeep"? Kind of surprising seeing as that company, you know, doesn't exist in this world.

Ghazan, the second super criminal escapee, is an earthbender, not a firebender.

Yes, we did know Aemon was a Targaryen. It was discussed when Jon Snow contemplated deserting the wall after Ned was beheaded.