“The Alien Parasite Hypothesis” — While out with Penny (Kaley Cuoco, left) and Bernadette (Melissa Rauch, center), Amy Farrah Fowler (Mayim Bialik, right) finds she has sexual feelings for Penny’s ex, while Koothrappali and Wolowitz try to prove who would be the better superhero, on THE BIG BANG THEORY, Thursday, Dec. 9 (8:00-8:31 PM, ET/PT) on the CBS Television Network.
Photo: Monty Brinton/CBS
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