When we left Falling Skies, the humans decided to accept help from the alien race, the Volm, who offered a secret weapon to destroy the Espheni. The intention of this new ally was left questionable.

Falling Skies Season 4 Episode 1 finds the 2nd Mass under attack from a new Espheni war machine. This is a new threat unlike anything they've ever faced before.

Lexi continues to grow quickly and develops remarkable abilities, which worries her parents. What is she?

The Falling Skies Season 4 begins on Sunday, June 22. Check out the official photos from "Ghost in the Machine" here and prepare to battle a foreign face once again: