The Big Bang Theory Season 5 Episode 2 : The Infestation Hypothesis
Priya has returned to India and she and Leonard are attempting a long-distance relationship. Their first time having cybersex is ruined when Leonard's screen freezes. Leonard then takes advice from Howard on how to maintain such a relationship and then prepares to perform one of the things he taught him, but is humiliated to learn that Priya's parents are sitting beside her.
Meanwhile, Penny picks up a new chair, which at first Sheldon thoroughly likes until he finds out that she picked it up off the curb. He begins to harass Penny to dispose of it, resulting in many rejections. Sheldon then enlists Amy to try and coax Penny to get rid of it. However, Penny catches on and tells Amy to leave. Amy, fearing her friendship with Penny is over, sits on the chair to show her loyalty. She is then...