It’s time for the Fringe season 4 finale! Part one of “Brave New World” airs tonight.

Don’t miss the exciting first part of the Fringe finale, which airs at 9/8c on Fox. In the episode,

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.

Watch the promo:

Need another reason to watch this episode? Lost star Rebecca Mader finally got her wish, and guest stars!