Yeah, but for every question answered, another 2 are asked. And the ending..WTF is that about!!
****STOP READING HERE IF YOU HAVE NOT SEEN IT********
Also, the dude in the arctic centre... Pause it, and take a good look at his face, specifically ear and nose shape. Then have a look at Jack, at the same features...He eitehr has a twin or is in 2 places at once!