The name of this Tvshow is The Big Bang Theory Season 4 released in 2010 and it's main theme is This season the Big Bang gang’s romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Raj’s sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself besties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette at least in Raj’s Bollywood daydream.