Penny wishes Leonard a happy birthday which she knows is this upcoming Saturday, when she expects him to at least come in for his free piece of birthday cake at the restaurant. She is shocked to learn that Leonard not only does not celebrate his birthday, but that he's never had a birthday party. Regardless of Leonard's wants, Penny decides to throw him a surprise party. Although she gets help from Sheldon, Howard and Raj, the preparation for the party does not go to her plans, including needing to help Sheldon buy a gift, Howard not being able to get Leonard out of the apartment, and Raj not being able to decorate the apartment since Leonard's there. Will Leonard enjoy his first birthday party after all this difficult effort?
Did You Know?
Sheldon (Jim Parsons
)'s statement about horoscopes being hokum is based on the work of Bertram Forer, a psychologist from UCLA. His classic 1948 experiment involved administering personality tests to groups of subjects, and then giving each subject the same exact personality evaluation (copied from a newspaper astrology column) and asking them to evaluate the accuracy of the results on a scale of 1 to 5. The average accuracy was rated at an incredible 4.2, indicating that people are generally willing to accept generalized descriptions of themselves because they WANT them to be true. This experiment has been repeated hundreds of times by various researchers; always with almost exact results, giving us "The Forer Effect" or "subjective validation". See more
Half way through the episode, Leonard claims to be playing a person in Copenhagen over Xbox Live, on Halo, however you can clearly see his Xbox 360 console doesn't have a Wireless Adapter or an Ethernet cable to connect him to the Internet. See more
Okay, here's the deal: you either you help me throw Leonard a birthday party, or so help me, God, I will go into your bedroom, and unbag all of your most valuable, mint-condition comic books and, on one of them, you won't know which, I'll draw a tiny little happy face in ink.
You can't do that! If you make a mark in a mint comic book, it's no longer mint.
Sheldon, do you understand the concept of blackmail?
Well, of course I... Oh... Hey, I have an idea: let's throw Leonard a kick-ass birthday ...
In the opening scroll of the time line when it gets to 91,000 there is a mistake the dates read 93,000BC 92,000BC 91,0009C 90,000BC for some reason 91,000 is a 9c not a BC. See more
References Halo: Combat Evolved
History of Everything (Instrumental version)
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Instrumental version of series theme song played over the closing credits] See more