The Big Bang Theory


Season 1, Ep 1, Aired 9/24/07
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  • Episode Description
  • Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins showing them that as much as they know about science, they know little about actual living.

  • Cast & Crew
  • Bill Prady

  • Chuck Lorre

  • Nicole Eberhardt

  • Kathy Nawabi

  • Michael Collier (I)

  • Fan Reviews (29)
  • laugh track explanation

    By AlexKotas, Nov 22, 2015

  • Remove laugh track?

    By GloriaDarcy, Dec 06, 2014

  • Remove Laugh Track

    By AriSky, Sep 17, 2013

  • Strong debut

    By generalfranci, Feb 02, 2013

  • Brilliant opening to an excellent show

    By viddy9, Jan 21, 2013

  • Trivia & Quotes
  • Quotes (15)

    • Howard: Bon douche. (Penny stares at him) That means "good shower" in French—a sentiment I can express in six languages. Leonard: Save it for your blog, Howard.

    • Leonard: At least I didn't have to invent 26 dimensions just to make the math come out. Sheldon: I didn't invent them, they are there! Leonard: In what universe? Sheldon: In all of them, that's the point.

    • Leonard: We need to widen our circle. Sheldon: I have a very wide circle. I have 212 friends on MySpace. Leonard: Yes, and you've never met one of them. Sheldon: That's the beauty of it.

    • Penny: I'm a Sagittarius, which probably tells you way more than you need to know. Sheldon: Yes, it tells us that you participate in the mass cultural delusion that the sun's apparent position relative to arbitrarily defined constellations at the time of your birth somehow affects your personality. Penny: (puzzled) Participate in the what?

    • Penny: (after seeing Leonard and Sheldon pantsed) I'm so sorry. I really thought if you guys went instead of me, he wouldn't be such an ass. Leonard: No, it was a valid hypothesis. Sheldon: That, "was a valid hypo"—what is happening to you?

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    Notes (12)

    • Leonard's and Sheldon's names are an homage to the late Sheldon Leonard, a renowned actor, director, producer and writer who is best remembered for his body of work in the 1960's. Penny is so named because in the original pilot, the guys found her sitting curbside, as though they'd found a lucky penny.

    • The German episode title is "Penny und die Physiker", meaning "Penny and the Physicists". The French title is "La Nouvelle Voisine des surdoués", meaning "The Gifted Ones' New Neighbor". The Italian title is "Pilota", and the Spanish and Mexican title is "Piloto".

    • Original International Airdates:
      Turkey: September 9, 2008 on CNBC-e
      Czech Republic: April 7, 2009 on Prima COOL
      Germany: July 11, 2009 on ProSieben
      Slovakia: August 17, 2011 on Markiza

    • All the whiteboard equations are real equations from quantum mechanics and physics. The writers have a physicist to assist them with the physics jargon.

    • This episode's end titles has Chuck Lorre's Vanity Card #182.

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    Trivia (4)

    • This episode establishes that Sheldon has his own "spot" on the couch. Even though he does eventually sit somewhere else in this episode, it is clear he is uncomfortable not sitting in his "spot".

    • Penny's clothes change after her shower, but she didn't have another set with her and it appears she didn't return to her apartment since Raj and Howard were there.

    • In this episode we learn that Penny is from a suburb just outside Omaha, Nebraska.

    • This episode establishes that Leonard is lactose intolerant and cannot process corn.

    Allusions (2)

    • Sheldon: "Do you think this possibility will be helped or hindered when she discovers your Luke Skywalker No More Tears shampoo?"
      Leonard: "It's Darth Vader shampoo. Luke Skywalker's the conditioner."
      Luke Skywalker and Darth Vader are characters from George Lucas' film series phenomenon, Star Wars.

    • The number 42: In this episode, Koothrappali wears a ballcap with the number "42" stitched upon it. According to Douglas Adams’ The Hitch Hiker's Guide to the Galaxy book series, 42 is the answer to the ultimate question of life, the universe, and everything.

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