“The Cohabitation Formulation” — As Wolowitz (Simon Helberg, left) contemplates taking things with Bernadette (Melissa Rauch, right) to the next level, Leonard rekindles his relationship with Raj’s sister, on THE BIG BANG THEORY, Thursday, Feb. 17 (8:00-8:31 PM, ET/PT) on the CBS Television Network.
Photo: Monty Brinton/CBS
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