Traveling to Dunwych, Maine, Parker finds the town in a state of disarray. Surviving a town-wide explosion, Parker backsteps to prevent a forgotten munitions depot from exploding and taking out the town. After backstep, Parker, Vukavitch, and Donovan all investigate Dunwych, but find no munitions. As everybody in town goes mad, Mentnor reveals Project Leviathan, a Cold War biological weapons project designed to induce madness in the enemy. In the previous timeline Dunwych was destroyed by FEMA to prevent the spread of Leviathan. With Owsley's (
Kevin Christy) help, and despite being infected, Parker succeeds in averting the bombing.