Talk:Earth's Last Stand/@comment-27116643-20160425002615/@comment-995426-20160425004136

Well, the Time Scepter involved only making changes to the past that preserved a single canonical future. So that was a supernaturally-imposed stable time loop.

But the Ulixes traveled back in time specifically to change the Earth's fate. And yes, I also had a WTF moment with the Earth turtles going off with the Ulixes again to do..."what, exactly?" They already changed the timeline, and don't actually need to do it again now that the Earth has been saved. So if they're traveling back in time for the same purpose, then it's a plot hole is worth complaining about, and we can safely say that this is the law of time the show uses.

Of course, since the season premiere, no plot hole has been bigger than the one that says the Ulixes couldn't travel back in time more than once because the black hole sucks time. It's the plot hole that launched a whole half season of writing-in-a-half-baked.