The episode centers on William Bell’s megalomaniacal plan to collapse both the "Blue" and "Red" universes.
: Bell intends to use Olivia Dunham as a biological power source. Her high levels of Cortexiphan make her a "living battery" capable of fueling the destruction of existing realities to create a "Brave New World" under his control. Fringe - Season 4Eps22
While the immediate threat of Bell is neutralized, the finale's epilogue shifts the tone. September the Observer appears to Walter, warning that directly setting up the Observer invasion and the dystopian future of the fifth and final season. Fringe: Season 4 Episode 22 - Brave New World Part 2 The episode centers on William Bell’s megalomaniacal plan
: The episode features creepy practical effects, notably Jessica Holt's face contortion, which was performed without CGI by actress Rebecca Mader . While the immediate threat of Bell is neutralized,
: After Walter extracts the bullet and Olivia miraculously heals, the team is told that the Fringe division will be funded once more.
In the Fringe Season 4 finale, the stakes reach a multiversal breaking point as the series shifts from its season-long conflict with David Robert Jones to the reveal of the true architect: William Bell . The Grand Design: A New Genesis
