The gang's romantic universe expands as Leonard, Howard, Raj and even Sheldon test their skills outside of the lab. On the rebound from Penny, Leonard falls into the arms of Raj's sister, Priya. Sheldon finally gets a girlfriend - or rather a friend who is a girl - Amy, a dour ne...urobiologist who adopts Penny as her new best friend. Howard and Bernadette's chemistry heats up - and so do Raj and Bernadette (at least in Raj's Bollywood daydream!).
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