Fringe: Season 3, Episode 20

3 - 20: 6:02 AM EST

In the parallel universe, Walternate activates his doomsday machine, triggering devastation in the prime universe. Peter realizes he has no choice but to enter the machine and try and break the circuit. Meanwhile, Fauxlivia resolves to save both worlds by trying to bring Peter back to convince the Secretary to stop the machine.