One of my favorites!
I’m not the world’s biggest Douglas Adams fan, but I always liked his approach to time travel: you can go back to the past, but you can’t change the future because it turns out that what you do is what you would have done anyway, so what happens is what did happen, and it all sort of works out so you might as well have a few drinks, meet a nice girl and try to enjoy it. Or will have worked out. Willen onhave outworked. Something.
I read a short, short time travel story once, in which a man builds a time machine so he can committ suicide painlessly. He figures he’ll go back, shoot his father, and never have been born. He always hated his dad anyway because he was"mean" to his mother.
So he goes back, shoots his dad, but doesn’t disappear. Turns out his dad, unbeknownst to him, is sterile, and his mom cuckolded her husband with a hired hand.
Schlachthof funf
I forgot about that one. It was a pretty good adaptation of the book.
I don’t think you can get pregnant that way.
Fetching Cody is neat little indie I was about to recommend in a different thread when I remembered that the plot revolves around time travel, and figured it was a worth a mention here.
Past the edit window, just thought of another one:
Repeaters is pretty cool. Three losers in rehab relive a miserable day over and over again. A bit of a darker take on Groundhog Day.
Caught the edit window this time, just remembered another one I liked quite a bit:
Salvage is another time-looping movie, like Repeaters, (which is probably why I just remembered it,) but more in the horror genre.
Since the thread has been brought into the future, I will say that I have always felt that the grammatical difficulties of time travel are overstated. English is perfectly capable of conveying the concepts, although the constructions may be somewhat more verbose than we’re accustomed to. The problem is people not paying sufficient attention and/or having difficulty with the causality. “Will have always been ” is a perfectly cromulent way of expressing the results of a hypothetical change to the timeline.
In post #20. 
I second … err, third it, by the way. Solid time travel logic, and I was amazed that I could tell (IIRC) 28-year-old Ron Silver from 40-year-old Ron Silver at a glance. Excellent acting and/or makeup.
Nope. I loved the book, and finally watched the movie last month after avoiding it since its release. I liked it a lot. It had a couple of flaws, but on the whole it was fun and well done.