The Infestation Hypothesis
The Big Bang Theory Season 5 Episode 2 (09/22/11)
Leonard and Priya try to keep their long-distance relationship alive. First, by having a meal together via skype and then more.
Penny finds a chair on the street for her apartment. Sheldon loves it until he finds out it was in the garbage. He tries to get Penny to get rid of the chair, even enlisting Amy's help.
Raj and Howard kiss ... sort of.