When Penny asks the guys to her party, which will include dancing, they seriously think about not attending as they aren't "dance" people. But when they learn it's a costume party (the fact of it being Halloween irrelevant), they change their collective minds and decide to go. Leonard wants this party to be an opportunity for Penny to see him as someone in her social circle. But Leonard's goals for the evening change when Kurt, Penny's ex-boyfriend, shows up, he who seems to be an invited guest and who Penny seems happy to see. Leonard, still smarting from his first and only other previous encounter with Kurt, tries to be Penny's protector while protecting himself from a potentially painful beating from Kurt. Written by
Did You Know?
First time that Penny kisses Leonard on the lips. See more
Homo Habilis is properly pronounced with the stress on "hab" instead of on "bil" as done by Leonard and Sheldon. Ironically, though Leonard was insulting Kurt by refering to him as H. Habilis, Leonard is actually closer to the average height of H. Habilis which was 4'3". See more
Leonard, you are so great. Why can't all guys be like you?
Because if all guys were like me the human race couldn't survive.
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