SEASON FINALE: Last week’s impressively staged battle, between Jon Snow’s small band of explorers and the endless White Walkers or whatever they’re called, was exciting – and even a bit sad, as one of Daenerys’ dragons was killed by the undead Night King. What’s worse, at least in terms of the escalating arms race against the no-longer-living winter warriors, is that the episode ended with the vanquished dragon rising from the dead, with those telltale bright blue zombie eyes… And now, tonight, the extended Game of Thrones season finale, with Jon, all by himself, left alone in the far north to face the entire undead horde, dragon and all.