You are viewing a list of 1 The Big Bang Theory episode featuring "Infestation" in their title.
  • The Infestation Hypothesis

    Season 5, Episode 2 - The Infestation Hypothesis
    Aired September 22, 2011

    When Penny takes in furniture she found in the street, germophobe Sheldon is horrified and urges Penny to remove the chair from the building. Amy finds herself caught in the middle of the argument between Sheldon and Penny. Meanwhile, Leonard is still adjusting to his long-distance relationship with Priya and tries to spice things up between them.