 Libby appeared in twenty-four episodes, twenty-one of them in the second season, one in the fourth, and twice in season six in "Everybody Loves Hugo" and the finale.As of the end of the third season, she is the only main character not to have a centric episode that details her past, though a brief flashback at the end of the episode "Dave" is shown from her point of view.She was supposed to return during the third season, but did not make an appearance.