Season 4, Episode 21 Brave New World

First Aired: May 4, 2012

Part 1 of 2. Walter reluctantly revisits his painful past after terrifying cases of spontaneous human combustion. Meanwhile, the future of both universes is at stake when the Fringe team faces David Robert Jones in the mother of all battles.

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Guest Cast

Rebecca Mader Jessica Holt
Jared Harris David Robert Jones
Leonard Nimoy Dr. William Bell