Watch Big Bang Theory The Psychic Vortex Online Stream. This is the first one to come out for this year for the Big Bang Theory series. The latest is the Big Bang Theory The Psychic Vortex. In this episode, While Sheldon and Koothrappali attend a university mixer, Leonard is upset to discover that Penny believes in psychics. Meanwhile, Raj meets Abby played by Danica McKellar at the mixer, who becomes the object of his attraction. The Big Bang Theory The Psychic Vortex will be aired January 11, 2010 on CBS. Watch Big Bang Theory The Psychic Vortex Online Stream.