Information Is Beautiful posted this rather confusing timeline of time travel in popular TV shows and movies. It was taken from the book The Visual Miscellaneum (Harper Collins) by David McCandless.

I find that this graphic is rather hard to read because of that stupid squiggly yellow year-line. This would have been much better if that line was just straight and everything else bounced around it. What the heck, right? That yellow squiggly line just screws everything over. This could have been so much more awesome. See the entire graphic here.