The Big Bang Theory/The Higgs Boson Observation
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The Higgs Boson Observation is the third episode of the sixth season of The Big Bang Theory, and the one hundred fourteenth episode overall.
Starring: Johnny Galecki (Dr. Leonard Hofstadter), Jim Parsons (Dr. Sheldon Cooper), Kaley Cuoco (Penny), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Dr. Rajesh "Raj" Koothrappali), Mayim Bialik (Dr. Amy Farrah Fowler), Melissa Rauch (Dr. Bernadette Rostenkowski-Wolowitz)
Guest Starring: Pasha Lychnikoff (Dimitri)
Co-Starring: Margo Harshman (Alex)