There are many things that annoy us about science fiction: godlike beings, lazy time-travel paradoxes, actions that don't have consequences... but luckily, there's one thing that epitomizes all of them: the reset button. Whenever the unthinkable happens, you can be pretty sure science fiction will unthink it. Click through for the many evils of the reset button.
Here are the main types of annoying reset buttons in science fiction:
The temporal paradox. Someone starts diddling the time-space continuum, and just by coincidence, suddenly all sorts of appalling things happen. The two best examples of this are the Star Trek: Voyager episode "Year In Hell Part 2" and the Doctor Who episode "Last of the Time Lords." In the Trek episode, the starship Voyager is destroyed, only to be restored when a "time-ship" that has been altering history is wrecked. In Doctor Who, Earth's population is nearing "terminal extinction," until the Doctor destroys a "paradox machine" that his arch enemy the Master built. Once that's done, time rolls back a whole year, undoing all the Master's horrible deeds, while David Tennant makes some awful yay-faces:
The godlike being. In the Marvel Comics series Secret Wars, a bunch of Marvel heroes are transported to another planet, called Battleworld, where the only thing to do is merengue. No, wait, I mean fight. And in the penultimate issue, every single Marvel hero... dies! For reals! You see Mr. Fantastic's intestines stretching out all over the place, and Spider-man is all splatted. (Okay, it's not really that graphic.) But then the Beyonder takes back his amazing godlike power from Dr. Doom, who's stolen it, and in the process all the heroes are restored to life. (Several times, in the case of Captain America.) Truly, a mighty resurrection.