Sheldon attempts to help Penny understand physics to impress Leonard, while Howard becomes jealous when Bernadette takes an interest in Leonard's research.
#1 | Released 2009-12-07, Rated TV-14 Score 20.081 |

#2 | Released 2009-12-07, Rated TV-14 Score 15.691 |

#3 | Released 2009-12-07, Rated TV-14 Score 14.965 |

#4 | Released 2009-12-07, Rated TV-14 Score 13.547 |

#5 | Released 2009-12-07, Rated TV-14 Score 12.871 |

#6 | Released 2009-12-07, Rated TV-14 Score 12.253 |

#7 | Released 2009-12-07, Rated TV-14 Score 11.535 |

#8 | Released 2009-12-07, Rated TV-14 Score 11.133 |

#9 | Released 2009-12-07, Rated TV-14 Score 10.980 |

#10 | Released 2009-12-07, Rated TV-14 Score 10.741 |

#11 | Released 2009-12-07, Rated TV-14 Score 10.693 |

#12 | Released 2009-12-07, Rated TV-14 Score 10.584 |

#13 | Released 2009-12-07, Rated TV-14 Score 10.523 |

#14 | Released 2009-12-07, Rated TV-14 Score 10.496 |

#15 | Released 2009-12-07, Rated TV-14 Score 10.366 |

#16 | Released 2009-12-07, Rated TV-14 Score 10.241 |

#17 | Released 2009-12-07, Rated TV-14 Score 10.095 |

#18 | Released 2009-12-07, Rated TV-14 Score 9.6142 |

#19 | Released 2009-12-07, Rated TV-14 Score 9.4988 |

#20 | Released 2009-12-07, Rated TV-14 Score 9.4743 |

#21 | Released 2009-12-07, Rated TV-14 Score 9.4694 |

#22 | Released 2009-12-07, Rated TV-14 Score 9.3095 |

#23 | Released 2009-12-07, Rated TV-14 Score 9.2428 |

#24 | Released 2009-12-07, Rated TV-14 Score 9.2065 |

#25 | Released 2009-12-07, Rated TV-14 Score 9.0849 |
