When a mission goes awry, Tom and Pope must rely on each other to survive; Weaver searches for two missing members of the 2nd Mass; Marina disregards Tom's authority.
The people of Charleston defeat another alien attack; Tom is invited to meet a powerful leader; Ben struggles with his identity; Anne uncovers information that puts everyone in... Full summary
The 2-year anniversary of the alien invasion approaches; a sniper attack creates questions and doubts within the new government; Hal thinks he knows the identity of the mole; Anne's... Full summary
Tom enlists a nuclear specialist to come up with a plan that will strip the aliens of their power; Tom and the leaders make a decision that jeopardizes trust among the group; Anne... Full summary
In Charleston, Tom is elected to a political office; Tom's decision to have the rebel skitters fight alongside humans creates tension; Hal struggles with vivid nightmares; Tom and Anne... Full summary
The 2nd Mass meets new faces; Tom comes across his former mentor; Maggie begins to realize that Pope might not stay with the group; Tector embraces his military past.
The 2nd Mass moves on to Charleston; the group grieves recent losses; Weaver learns about Tector's background; Matt starts to bond with a harnessed girl.
Ben is betrayed by someone he thought he could trust; Tom captures another hostage; Weaver offers Matt a job; members of the 2nd Mass are trapped in a basement.
Hal finds bodies of de-harnessed children and someone from his past; Tom and Anne grow closer; Weaver's health begins to deteriorate; Tom discovers that Weaver may have been keeping... Full summary