with no plot holes.

Haven't seen Time Crimes.

But Primer even has this flaw; it just tries to resolve the 'what if's' plot holes on so much that it because a part of the movie/plot itself (five or six different versions of themselves, etc).

The basic idea of someone travelling back in time and changing shit breaks pretty much everything because it negates everything that happened before it (if you start thinking deep enough character history and motivation disappear, etc)

You can use the whole 'alternate timeline' nonsense to fix it, but still you run into a dude hopping from basically different dimensions to different dimensions; what's happening in his OG universe of he hopped out of the timeline, etc...

That said, when done correctly, still entertaining as fuck.

But a thread on 'successful' time travel movies and why they would would be fun