It's an 88-minute one, so double-length. They backhandedly answer a lot of questions (you have to think before you realise they've been answered, but all the dots are there), but so many new questions are created that it makes you want the new season right now. It's brilliant, by the way, although you'll probably be raging immediately after it's concluded; you just have to think about all the ways it expands the plot and subverts expectations before you realise how brilliant it is.
Keep in mind the title of the episode when you think over the implication of the events depicted in it on the continuity. Some people on various internets boards seem to be drawing the wrong conclusion.