First off let me just say that I love this show. It's my favorite show of all time. The plot lines are riveting, the characters are so developed, the lines are hilarious and genuine and the acting is amazing. I never get tired of watching TBBT.
So I just joined this site today and this is my first post, so I apologize if someone else has already brought this up. I was watching clips from the show on youtube today and it occurred to me that Penny might be the most important character on the show. She shows up in the apartment building and things start to change. Without her, the guys
