 September takes Michael to the past to hide him from the Observers.Much of September's machinations with Fringe in the first four seasons were to prepare Walter to use Michael for their plan to defeat the unemotional Observers ("The Boy Must Live").In 2036, September, who has been made human by the Observers and has given himself the name of Donald O'Connor (after the actor in the movie "Singin' In The Rain") reveals his plan to take Michael to 2167, the year that human genetic experiments replacing all emotion with pure logic, will be performed.