I don't doubt that traveling back in time will be possible some day.
Only 100 years ago you would have been locked up for being a looney if you said people could communicate with other people on the other side of the world instantly.
Or you could travel around the world in a day
Just looking into what we already know about worm holes and the time stream there must be a way to break one space in time and come out in a different space at a different time
Sorta the whole parallel universe doubling over kind of deal