BURBANK – NOVEMBER 17: “The Psychic Vortex — While Koothrappali (Kunal Nayyar, left) and Sheldon (Jim Parsons, right) attend a university mixer, Leonard is upset to discover that Penny believes in psychics, on THE BIG BANG THEORY, Monday, Jan. 11 (9:30-10:00 PM, ET/PT) on the CBS Television Network. (Photo by Sonja Flemming/CBS via Getty Images)