A More Perfect Union – When skitters approach the newly combined resistance force, the groups’ interaction surprises everyone. Meanwhile, Tom finds out life-changing news just as the 2nd Mass comes face-to-face with their most dangerous threat to date.

The Price of Greatness – The 2nd Mass meets new faces, while Tom comes across his former mentor and professor Arthur Manchester. But it’s difficult to know whom to trust. Maggie begins to realize that Pope may not be sticking with the group very long. And Tector embraces his military past. .

Death March – The 2nd Mass pushes on to Charleston, but some are still grieving the group’s recent losses. Weaver learns more about Tector’s background before the invasion. And Matt begins to bond with a harnessed girl who was found recently.

Molon Labe – Ben is placed in harm’s way by someone who he thought he could trust. Tom captures another hostage. Weaver offers Matt a job to lift his spirits and make him feel useful. And when members of the 2nd Mass are trapped in the basement of a building, the situation takes a turn for the worst when they find themselves faced with a new enemy.

Homecoming – Hal stumbles across bodies of de-harnessed kids and finds someone from his past. Tom and Anne grow closer. And Weaver’s deteriorates just as Tom discovers he may have been keeping important matters from the group in order to protect them.

Love and Other Acts of Courage – A familiar person returns to the unit, but his motives are scrutinized. Elsewhere, a captured skitter is imprisoned at the camp, and Hal connects with Maggie as she casts light on her past.

Young Bloods – Ben and Hal go on patrol and help a boy, only to have their bikes stolen. The subsequent search for the bikes leads to a major discovery. Meanwhile, Matt steps into a dangerous situation; and Weaver reconnects with a family member.