the disturbance appears, much larger and more destructive than before. It pursues Olivia and Walter out of the restaurant, but dissipates after being hit by a car. After resolving the situation with the police, Olivia and Walter return to Cameron's home, catching him before he can evade capture. Cameron explains that he resents what Walter did to him, as his power makes it difficult to live a normal life. When the same disturbance appears, Cameron is able to use his power to disperse it, and Walter realizes that Cameron is not the cause of the disturbance; should more such disturbances continue to appear, they would eventually destroy the world. Walter convinces Cameron to help him to destroy the disturbance the next time it appears. They travel to a nearby power station and wait. When the disturbance does appear, Walter guides Cameron in actions that will stop it, but Olivia, recognizing a human figure within it, fires her gun, distracting Cameron long enough to cause the disturbance to disappear. As they try to figure out what to do next, Olivia receives a call from Broyles (Lance Reddick), explaining that they have come across a man who had just appeared in Reiden Lake and who knows far too many confidential details about Fringe. After dropping off Cameron, Olivia and Walter go to the hospital where the man is being held, asking for Olivia by name. As Olivia is taken to the man, Walter discovers to his relief that Olivia has refused to allow him to be re-hospitalized. Olivia is shown to where the man is being held. The man is revealed to be Peter Bishop and he is much relieved to see Olivia. Olivia can only ask "who are you?" Production "Subject 9" was co-written by co-showrunners J.H. Wyman, Jeff Pinkner, and consulting producer Akiva Goldsman. Executive producer Joe Chappelle returned to serve as episode director. Leading up to the episode's broadcast, actress Anna Torv noted that "Subject 9" is when "all of the little bits and pieces come into place – especially regarding the whole question of 'When is Peter Bishop going to make an appearance?'" She expressed appreciation that her character Olivia was able to grow closer to Walter due to Peter's absence, noting that this was her favorite part of the episode. Torv added that "Subject 9" would give viewers further insight into the differences between this Olivia and