Jim prepares for another day at work as a guard at White Prison. During his commute, he notices that something is off.

As Jim scavenges through broken pieces of equipment, Walter reluctantly lends a hand. They manage to signal for help but must escape discreetly.

Jim has a flashback to his childhood self with Ed and Marnie. Back in reality, an unlikely ally rescues him from the rubble.

Devastated by the horrendous sight, Jim rushes to save Ed. But they are no match against the deadly beast.

After Dr. Hadson blacks out, Marnie attempts to take over the navigation. Meanwhile, Boyd and Rachel provide vital information regarding the Swarm.

All hope is lost, but nature doesn’t wait — Marnie goes into labor. Walter reveals the truth about his dark past.

With everyone's support, Jim sets his plan in motion to bait the Swarm. All seems to go well until Howard goes rogue.