Best/Worst Threequels

[Sussudio]

This thread might only last 10 or so movies, but what do people think are some of the best/worst 3rd movies in a series? Or what threequels do people think are better/much worse than the first 2?

It would be cool to hear about some movies that aren't as highly famous as the obvious Spidey3, Godfather, etc which come to mind, though this might only be a few movies. I think Bourne Ultimatum definitely lands on the best list...