The ending was not as thrilling as the rest of the movie though they did save the people by changing the destiny which was their mission from start. But Doug was alive even after he died. How did that happen? How were there two of him in the same reality? The ending was not good. As per the concept of the movie there is no way that he would have gone to past as per new reality. The ending was confusing and probably not good in how it was carried out. Something didn't add up. But now I know that why it is liked by only 88% people despite its above 7 IMDB rating.