The Big Bang Theory, Season 6 Episode 3: When Sheldon hires a female grad student to assist him, a jealous Amy asks Penny to help her spy on them. On the space station, Howard begins behaving erratically.
Title: The Higgs Boson Observation
Air Date: October 11, 2012
The Big Bang Theory (2007) | Season 6 - Episode 3 Links
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