I'd throw in Terminator for traveling back in time to prevent destruction of the world, and using garbage to fuel his blender shaped power unit reminds me of Mr. Fusion from Back to the Future III.

This had a bit of a K-Pax feeling, even though K-Pax is not about time travel. And there's The Time Traveller's Wife if you want a less nerdy time travel story...

I think I need to hand my geek card in - I only caught the Doctor Who one.