“The Alien Parasite Hypothesis” — While out with Penny (Kaley Cuoco, second from left) and Bernadette (Melissa Rauch, second from right), Amy Farrah Fowler (Mayim Bialik, far right) finds she has sexual feelings for Penny’s ex (Brian Thomas Smith, far left), 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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