Well, to change a little, this time I do not share a picture of Penny, but of this pervert scientist. Let me know where to find one like this.
Regarding this series, the main idea is Penny and Leonard being committed in some kind of relationship. Of course that ends mostly at the end of the season, just in a way the next season can grow in interest somehow. Other than that, there are mainly two episodes I really liked. The first one if the one presented in the picture above. It was fun. The second one explaining how Sheldon and Leonard met and agreed to those apartment rules.
Also, in this series we know that Sheldon likes Ubuntu. So, not so smart as we think he is…