Complete story — includes the ending
After having finally dug the Volm weapon out of the rubble it was buried under, the 2nd Mass stages its attack. While Weaver leads a diversionary attack on the Chicago tower, Tom assaults the Boston tower with the Volm weapon and manages to destroy it, shutting down the Espheni defense grid. With the defense grid down, the promised Volm reinforcements finally arrive in a gigantic city-sized ship that destroys the remains of Boston when it lands. It is then revealed that the Volm reinforcements are being led by Cochise's father. Unfortunately, while the 2nd Mass is celebrating their victory, Tom and Weaver discover that the Volm intend to keep the humans out of the war by shipping them off to relative safety in Brazil. Angry at being deprived of their chance to fight for their planet, Tom and Weaver object. Tom is taken into custody and Weaver is forced to surrender the 2nd Mass to the Volm. However, Cochise's father is intrigued by the humans' eagerness to fight, and Tom and Cochise manage to convince him to let the 2nd Mass go; the Volm stand down and allow the humans to fight the Espheni also, despite the great dangers they still face. The 2nd Mass is beginning the long trek back to Charleston when an Espheni ship lands nearby. Karen then reveals herself, offering a truce (as the Espheni are weakened) and telling Tom that the Volm cannot be trusted. Tom responds by vengefully shooting Karen, fatally wounding her. Hal tends to a dying Karen, whom Maggie finishes off with her gun. Tom then discovers that Anne and Alexis are in fact still alive- Karen had brought them to him as a gesture of good faith for her truce. However, as Tom reunites with Anne, he is shocked to see that Alexis has grown to the equivalent of a six-year-old in just two months. When they return to the regiment's camp, Alexis comes across Lourdes and, through some unknown means, extracts and destroys the eye worms infecting her with her bare hands, to the amazement of Tom and Weaver.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Falling Skies season 3. HTML formatting and reference markers removed. · Content license