Synopsis:
“Falling Skies tells the story of the aftermath of an alien invasion; It follows a group of survivors who must band together in order to fight back against the invading aliens. The group, known as the 2nd Mass, is led by history professor Tom Mason who, in search of his son, must put his extensive knowledge of military history to the test as one of the leaders of the resistance movement.”
Source: http://www.impawards.com/