The Big Bang Theory (2007–2019)
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The Cooper-Hofstadter Polarization 

Leonard and Sheldon's friendship is put to the test when Leonard wants to present a paper they co-authored at a physics convention, but Sheldon doesn't.


Joel Murray


Chuck Lorre (created by), Bill Prady (created by) | 5 more credits »




Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Talbott Lin ... Chinese Leonard
Howard Chan ... Chinese Sheldon


Leonard finds a letter in the trash can, the letter an invitation for him and Sheldon to speak at an upcoming conference on the topic of their latest joint research findings. Sheldon threw the letter out since he didn't want to do it. This brings to the forefront several issues. Has Sheldon thrown out any other important letters to Leonard? Who has the right to their joint intellectual property, especially if Leonard wants to present? Whose idea was the research to begin with? In Penny's eyes, does Leonard own anything appropriate to wear to the conference? Can Leonard and Sheldon come to a compromise so that they will speak to each other and be friends again? Written by Huggo

Plot Summary | Plot Synopsis


Comedy | Romance


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English | Mandarin

Release Date:

17 March 2008 (USA) See more »

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Did You Know?


Leonard (Johnny Galecki) states to Penny (Kaley Cuoco) while going through his closet that he had only one tie, the reversible one, but in episode 1.5 The Big Bang Theory: The Hamburger Postulate (2007), a different tie hangs on Leonard's door knob with a completely different pattern. See more »


When Leonard and Penny go through his closet, they set some shirts on the bed. The shirts change position between shots. See more »


Howard Wolowitz: Howard: Gentlemen, I am now about to send a signal from this laptop through our local ISP, racing down fibre-optic cable at the speed of light to San Francisco, bouncing off a satellite in geosynchronous orbit to Lisbon, Portugal, where the data packets will be handed off to submerged transatlantic cables terminating in Halifax, Nova-Scotia, and transferred across the continent via microwave relays back to our ISP and the X10 receiver attached to this
[clicks mouse, lamp switches on]
Howard Wolowitz: lamp.
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Crazy Credits

CHUCK LORRE PRODUCTIONS, #196 my soul's journey To let go of the fear and anger which imprisons my heart, To relinquish all childish expectations and live joyfully in the world as it is -- not as I wish or imagine it to be, To be free of the always craven and ever-craving ego, To be released from the endless hungers of the body, To see God in others, To see God in everything, To die without death and merge my consciousness into the cosmic sea of bliss from which I came, To crank out two sitcoms a week that can compete with a deaf chick dancing her ass off... This is my soul's journey. See more »


Spoofs 2001: A Space Odyssey (1968) See more »


History of Everything (Instrumental version)
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Instrumental version of series theme song played over the closing credits]
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