timetravel Move to a later date, say Make history, in a way Going back, in a way Experience for Marty McFly Cause of many fictional paradoxes Basis of the Doctor's adventures on "Doctor Who" "Lost" motif "Doctor Who" subject "Back to the Future" feature "Back to the Future" subject Subject of an H.G. Wells novel Sci-fi subject "Back to the Future" theme The grandfather paradox implies that itÂ’s impossible Solution for someone who's stuck in the past? Sci-fi odyssey for a New York player Revisiting the past? Not live in the present?