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Fringe, season 4 episode 17 «Everything in Its Right Place»: air date April 6, 2012. Episode overview, season trailer and the cast of Fringe.
Heading over to the Alternate Universe, Agent Lincoln Lee and the other Fringe Division track a vigilante who is leaving mutilated corpses in his wake, only to discover a hidden connection to the shapeshifters both universes have been hunting.