Elizabeth, commonly known as "Libby," is a fictional character in the ABC television series Lost and is played by Cynthia Watros. She appears in 18 episodes of the second season of the series. As of the end of Season 3, she is the only main character not to have a centric episode, though it should be noted that a flashback at the end of the episode "Dave" was focused on her. She will return for the first time in the season 4 episode, "Meet Kevin Johnson."