in string theory time is the 4th dimension (with x,y,z being the first 3). and in string theory there are 10 dimensions each ontop of the others. if you could move your self around in the 5th dimension then you could move to from any point in the 4th dimension(time) to another point without going throw the points inbetween.
If you went up to the 10th dimension then what you would see is everything that is(the universe now), was(the universe in the past), will be(the universe in the future), could have been(everything that could have happened in the past), could be(everything that could happen in the future) AND everything that is impossible and could never have happened or will happen. and all this would be in 1 infinantly small dot.
see
http://www.shoutwire.com/viewstory/18527/The_Tenth_Dimension
(imagining the ten dimensions flash)