The best Big Bang Theory episodes understand exactly what the show is and is trying to be, but its original pilot did not. The Big Bang Theory used to be a very different show, and it certainly was not a good one. The original Penny was fired, cast members weren't written in yet, and the whole thing almost didn't happen. This is a look at the original Big Bang Theory pilot and how it went so wrong, that Penny had to be fired. #Nerdstalgic #BigBangTheory #Penny