Grey Matters

When some people who have been institutionalized for years in mental facilities start to be completely rid of their afflictions, the Fringe gang spring into action. It would seem that the perpetrators have been careless and left a patient unfinished. Walter, it turns out, had been a part of this process in the early days. The purpose is to install brain tissue and remove it later when it contains memories and significant information. Walter is quite valuable because of his specific knowledge about the parallel universes and Dr. Bell. Olivia must make a dramatic decision which could jeopardize the entire world in order to save a friend. It does, of course, set up future events.