Season 1 Episode 9: The Cooper-Hofstadter Polarization

Season 1 Episode 9: The Cooper-Hofstadter Polarization

Season 1 Episode 9 " The Cooper-Hofstadter Polarization" aired 3/17/2007. When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard, and Penny's intervention only exacerbates the situation.

 Season 1 Episode 9: The Cooper-Hofstadter Polarization

 Season 1 Episode 9: The Cooper-Hofstadter Polarization

 Season 1 Episode 9: The Cooper-Hofstadter Polarization