This episode is all about the graduation of Sheldon and Missy. The bond between the twins are not show as much, but this is the closest thing ever to that. Sheldon delivering the speech because his sister motivated him and said not to be nervous about it at all and one should face their fear. The expression on the face of Missy when Sheldon told it was because of her, he was able to speak infront of the crowd was wholesome, beautiful and the epitome of the unbreakable bond between siblings. I wish we were to have some more of that in the series. The best episode of all seasons and all reasons.