'Falling Skies' Two-Hour Season Finale Tonight: Space Oddity and Shoot The Moon

Sarah Carter, Drew Roy and Connor Jessup.
Photo Credit: James Dittiger

TNT airs back-to-back episodes of Falling Skies on Sunday, August 31 starting at 9 p.m. ET/PT to wrap up the show's fourth season.

In Part 1 of the season finale at 9 p.m. ET/PT, "Space Oddity" Tom's mission to destroy the Espheni Power Core is complicated by Lexi's return. Lexi is forced to take extreme measures to save her father's life – and her own – after a Beamer malfunction. Meanwhile, the 2nd Mass fears an impending Espheni strike by the scorched Overlord. Treva Etienne guest stars.

In Part 2 at 10 p.m. ET/PT, "Shoot The Moon," with the weight of humanity's survival on Tom and Lexi's shoulders, they must defeat Tom's mortal enemy and find a way to destroy the omnipotent Espheni Power Core. Meanwhile, a new, terrifying Espheni Bomb is dropped onto Chinatown, immobilizing the 2nd Mass and preparing them for Human Skitterizaton. Mira Sorvino and Treva Etienne guest star.

Watch a sneak peek video below: