The Big Bang Theory (2007– )
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The Extract Obliteration 

Penny enrolls in a college class and keeps it a secret from Leonard. Sheldon causes conflict with Dr. Stephen Hawking over an online game.



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Episode complete credited cast:
Stephen Hawking (voice)


Sheldon and Stephen Hawking begin playing a popular online game Words with Friends. When he stops responding to their game, Sheldon begins obsess about being ignored. Meanwhile, Penny goes back to school by taking a history class at the local community college. First she doesn't tell Leonard about it. After he finds out about it, he rewrite her paper while she was asleep making her mad. Penny wants to prove that she is more than a waitress. Written by laird-3

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Release Date:

1 November 2012 (USA)  »

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Aspect Ratio:

16:9 HD
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Did You Know?


Sheldon reports that his mother always says "To thine own self be true." She is, in fact, quoting Polonius in Act 1, Scene 3 of Shakespeare's play Hamlet. See more »


After revealing that she is taking a class at a community college, Penny tells Leonard that he had the chance to sleep with a college girl. Leonard then brings up the fact that, after four years college and five years of grad school, he has never slept with a college girl. However, in season one, he engages in a sexual relationship with Dr. Leslie Winkle, then pairing up with Dr. Stephanie Barnett in season two. Leonard and Penny are using the term "college girl" to mean someone who is still in college. Neither of those women were in college when this happened. They had both graduated. See more »


[first lines]
Raj Koothrappali: Try to keep up, Howard; I'm killing it.
Howard Wolowitz: Yeah, I wish we looked this cool dancing in clubs as we do right now.
Leonard Hofstadter: Don't worry, this is exactly how you look when you're dancing in clubs.
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Crazy Credits


I've decided to save everybody a lot of unhappiness and not submit this week's vanity card to the CBS censors (I know when I've crossed the line with these things and don't need a bunch of corporate lawyers getting their cotton blend panties in a bunch). Accordingly, I've banished the offending card to that dark place where all my offending cards go - the internet. See more »


References Star Wars: Episode IV - A New Hope (1977) See more »


The Big Bang Theory Theme (Instrumental)
Composed and Performed by Barenaked Ladies
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User Reviews

I loved this ep of "The Big Bang Theory" called "The Extract Obliteration"
5 December 2012 | by (Baton Rouge, La.) – See all my reviews

In this ep of "The Big Bang Theory": Sheldon has invited Stephen Hawking to play "Words with Friends" with him and he accepted. And Penny's revealed to Bernadette and Amy that she's going to a community college for a history class. Leonard didn't know at the time and when she reveals it to him, he can't help overdoing his reaction like she feared. So he reads her paper, finds it terrible, and tries to fix it. And, of course, that didn't go well. Meanwhile, Sheldon wonders why-after giving Hawking his word online-Stephen hasn't replied with his word...This was another hilarious ep of "The Big Bang Theory". I mean, besides what I described above there's also Howard and Raj giving competing version of certain accents and their earlier dance to some "Star Wars" stormtroopers moves on the computer. So on that note, "The Exract Obliteration" definitely fired on all cylinders!

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