It's all in the Ending.

Rating: 8/10 (2 November 2014)

At the starting you may feel like that what is heck is going on but later you began to realize that there is much more than just a time loop.If you didn't get the ending ...then don't think it as omega is every time sending tom cruise back in time BUT in reality it sends them in future . For example lets assume there is two parallel line on one there is omega and on other there is real world and tom cruise . Now if omega senses any threat to alpha then it alters second time line and sends tom cruise in past , While knowing what will happen in future . But if you'll consider that there's only one time line then there will be more than one omega each time it travels back., this theory contradicts theory of relatively. Go watch this movie and this time you have to take your brains with you too ;)