Fringe: The End of All Things

"The End of All Things" is the fourteenth episode of the fourth season of the American science-fiction drama television series Fringe, and the series' 79th episode overall. In the episode, the fringe team investigates Olivia's (Anna Torv) disappearance, ultimately tracing back to David Robert Jones (guest star Jared Harris). It was written by co-executive producer David Fury and directed by Jeff Hunt. The episode marked the beginning of a four-week break for the series, though the producers initially thought the gap would start with the following episode, "A Short Story About Love". Executive producer Jeff Pinkner called it a "game-changer" that would "peel back some layers" surrounding the Observer's background. "The End of All Things" first aired on February 24, 2012 in the United States on the Fox network to an estimated 3.1 million viewers, an increase from the previous week. It received generally positive reviews from critics, with many praising Harris' performance and the unveiling of more of the series' mythology. In 2013, following the conclusion of the final season, IGN ranked the episode the fourth best of the entire series.