 In the fifth and final season, Michael is revealed to be part of the plan by Walter and September to stop the Observers.Sometime after the Purge by the Observers, Walter hides Michael in a pocket dimension with the help of September (now stripped of his powers and known as Donald) ("Through the Looking Glass and What Walter Found There").After Walter and the rest of Fringe Amber themselves, Donald returns to the pocket universe to extract Michael, then sheltering him with former Resistance fighters who escape detection by isolating themselves on a remote island.