There is no paradox if we live in an Everit-Wheeler model multiverse.
If that turns out to be true, then traveling to the past would create a seperate reality abscent from the world and timeline you left when you went to the "past".
This is one of those things that will probably be resolved/understood if/when we have a true unified theory instead of a seperate science dedicated to the quantum.
There are even more and stranger possibilities.
Haven't owned a tv in years, and don't read scifi. I'm duel statted nerd/geek.