All episode titles in seasons 1-4 have the same number of words as the number of the season in which they appear. All season one episodes have one-word titles (e.g. Doubt), all season two episodes have two-word titles (e.g. Real Deal), all season three episodes have three-word titles (e.g. After the Fall), and all season four episodes have four-word titles (e.g. Anatomy of a Joke).