Board Thread:General Discussion/@comment-26346951-20150716173453/@comment-24674051-20150717150232

The problem is it doesn't matter WHO does the killing. It's the fact of the killing itself.

Some of hte more recent time travel stories use a slightly different variation on the theme, where the child goes back, accidentally changes something that puts the future in jeopardy, and then has to hurry to make things right. This was the Season 3 Finale, and It was Back to the Future (to use 2 examples), there are others. But these are still built around the Grandfather paradox, and trying to deal with the consequences thereof.

This is what makes writing a good time-travel story very difficult. The writers pulled it off reasonably well with the season 3 finale, but that is about as far as it needs to go.