FALLING SKIES opens in the aftermath of an alien attack that has left most of the world completely incapacitated. The few remaining survivors have banded together. Each day is a test of survival as citizen soldiers work to protect the people while engaging in a campaign against the occupying alien force, whose purpose remains a mystery.
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.