Fringe delves deeper into the psyche of Peter Bishop in one of the most bipolar ways in television history. One minute he is this sweet man that is being used as a pawn in an inter-universal war and the next he turns into Anakin from Revenge of the Sith. Continuing to progress the main plot line, Massive Dynamic rebuilds the mystery weapon that we were introduced to back in the Season Two finale (A.K.A: The McGuffin 2000; Order now and receive a copy of Crisis on Infinite Earths). We still don’t know what it does, how it works, or why Peter is the ammo for the weapon, but that’s what our heroes try to find out… and Peter ends up going through some serious stuff before the end of the episode.
The episode opens up with the Fringe team being taken to Area 51 where M.D. has recreated the ancient super weapon (brilliant idea!). As soon as Peter steps into the main room, the device releases some kind of tremor which they believe has been affecting Peter’s body in some way. The episode is then divided into two equally important stories: Peter’s health and how Walter is dealing with his son being used as a lab rat; and Olivia’s investigation into the executions of undercover shapeshifters that could have been leads.