Time travel works like this:

There is no time travel. Every moment occurs now. Linear existence, as we perceive it, is a fallacy. The clumsiness of our physical bodies keeps us from truly experiencing time. But, if we were able to release ourselves from our physical bodies, then we would truly experience time as it is. When people speak of the "white light" as they die, it's not heaven: it's the brilliance of a non-linear world.

Derek Singh is positive of this. Which is why he needs his girlfrien