The Big Bang Theory franchise is really spoiling us lately with yet another incredible character return in Stuart Fails to Save the Universe. So far, Stuart Fails to Save the Universe has done a brilliant job of refamiliarizing us with some of the original series' most beloved figures. The Big Bang Theory has changed forever anyway; there's no doubt about that, but I wholeheartedly believe that this romantic pairing is one of the things that will stay the same. Is this a universe in which Leonard and Penny's ending in The Big Bang Theory never happened? I hope not, but with eight more weeks left on Stuart Fails to Save the Universe's release schedule, anything could happen.