There's an interesting short film called
La Jetee about experiments in time travel that take place in a post apocalyptic world. What I found interesting about it was not so much the story itself but if you distill the story down to it's constituent elements and essential significance then there might be something accurate about it regarding time travel and its possibilities.
There's a description of the story here:
http://en.wikipedia.org/wiki/La_jet%C3%A9e
I found the story itself interesting much in the way I liked the twilight zone stories but what particularly caught my attention was how the man in the story was able to enter into the past with his consciousness and in some way was able to 'participate' in the events there, and also interesting to me was when he was in the future he asked the future people in that world the wherewithal to save the present. So I'm wondering if this is really possible, to travel in time in that sense, with one's consciousness.
Then I remember reading about this guy Arnold J. Toynbee who claimed that on some occasions he would have these spontaneous moments where his consciousness would be "carried down in a 'Time pocket'" and there was "the local annihilation of Time" and from this he was able to connect to the past and in some way was able to enter into past events.
Toynbee says in his writings (given here in this webpage):
_http://www.worldtrans.org/newslog2.html/__cat/_c49/History,+Ancient+World
"the experience of a communion on the mundane plane with persons and events from which, in his usual state of consciousness, he is sundered by a great gulf of Time and Space that, in ordinary circumstances, is impassable for all his faculties except his intellect. A tenuous long-distance commerce exclusively on the intellectual plane is an historian's normal relation to the objects of his study; yet there are moments in his mental life -- moments as memorable as they are rare -- in which temporal and spatial barriers fall and psychic distance is annihilated; and in such moments of inspiration the historian finds himself transformed in a flash from a remote spectator into an immediate participant, as the dry bones take flesh and quicken into life."
I don't know how valid anything is concerning what Toynbee wrote regarding his supposed trips back into the past but it does make me think if 'time travel' of some kind is possible using consciousness alone then if there is anything at all to these so called 'time machines' then any kind of machine might just be an imitation of this principle at a lower level, with more mechanical laws, then what can be done with consciousnesses alone, or maybe a machine can facilitate this kind of mental transfer (assuming time travel via consciousness is possible). Don't know though. Just some thoughts on this fwiw.